Hỏi đáp về Tỉ lệ thức - Đại số 7

Array
(
    [0] => Array
        (
            [faq_id] => 541108
            [faq_title] => Tìm x, y biết \(\frac{x}{2} = \frac{y}{3}\) và \({x^2}.{y^2} = 72\)?
            [faq_code] => 
            [faq_content] => 
giúp mik bài này vs ạ

mấy bạn ơi mik cần gấp bài này ai giải chi tiết dũm mik vs ạ mik cảm ơn trước 


            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-06-11 20:01:43
            [faq_num_answer] => 0
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 670325
            [user_username] => 
            [member_email] => 
            [member_firstname] => Huong Nguyen
            [member_lastname] => 
            [member_avata] => images/avatar/library/6.jpg
            [member_createdate] => 2020-04-30 06:56:14
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [1] => Array
        (
            [faq_id] => 520090
            [faq_title] => Chứng minh đẳng thức ac/bd=a^2+c^2/b^2+d^2
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-04-23 20:17:58
            [faq_num_answer] => 0
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 455307
            [user_username] => 
            [member_email] => 
            [member_firstname] => Mỹ
            [member_lastname] => Phượng
            [member_avata] => images/avatar/library/8.jpg
            [member_createdate] => 2019-10-20 19:23:02
            [member_numpoint] => 32
            [member_isninja] => 0
            [faq_point] => 0
        )

    [2] => Array
        (
            [faq_id] => 518976
            [faq_title] => Tìm x biết 1/3+1/6+1/10+... +2/x.(x+1)=2016/2018
            [faq_code] => 
            [faq_content] => Tìm x  

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-04-21 12:17:09
            [faq_num_answer] => 3
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 660025
            [user_username] => 
            [member_email] => 
            [member_firstname] => Hằng Thu Nguyễn
            [member_lastname] => 
            [member_avata] => images/avatar/library/6.jpg
            [member_createdate] => 2020-04-21 12:11:41
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [3] => Array
        (
            [faq_id] => 513788
            [faq_title] => Tính diện tích khu đất hình chữ nhật biết độ dài 2 canh tỉ lệ với 0,4 và chu vi san trường la 280 m
            [faq_code] => 
            [faq_content] => Tỉ lệ với 0,4 chu vi sân trường 280m
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-04-09 08:59:30
            [faq_num_answer] => 0
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 644014
            [user_username] => 
            [member_email] => 
            [member_firstname] => Đào Hằng
            [member_lastname] => 
            [member_avata] => images/avatar/library/15.jpg
            [member_createdate] => 2020-04-09 08:55:19
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [4] => Array
        (
            [faq_id] => 510919
            [faq_title] => Cho a/b=3/4. Tính A=(a^2+3b^2)/(a^2-3b^2)
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-04-03 08:10:35
            [faq_num_answer] => 5
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 635900
            [user_username] => 
            [member_email] => dang72v13@gmail.com
            [member_firstname] => Nguyễn Khoa
            [member_lastname] => Đăng
            [member_avata] => 92061585830294.jpg
            [member_createdate] => 2020-04-02 19:24:01
            [member_numpoint] => 12
            [member_isninja] => 0
            [faq_point] => 0
        )

    [5] => Array
        (
            [faq_id] => 509355
            [faq_title] => Tìm x biết (x-1/5)^2004+(y+0,04)^100+(z-3)^678=0
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-30 13:07:20
            [faq_num_answer] => 4
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 631634
            [user_username] => 
            [member_email] => thaonguyen1491981@gmail.com
            [member_firstname] => Thao Nguyen
            [member_lastname] => 
            [member_avata] => images/avatar/library/15.jpg
            [member_createdate] => 2020-03-30 08:24:33
            [member_numpoint] => 4
            [member_isninja] => 0
            [faq_point] => 0
        )

    [6] => Array
        (
            [faq_id] => 508192
            [faq_title] => Tìm x và y biết x/3=y/4 và x+y=28
            [faq_code] => 
            [faq_content] => Giúp mh giải nhanh vs ạ  

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-26 15:14:56
            [faq_num_answer] => 3
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 512385
            [user_username] => 
            [member_email] => 
            [member_firstname] => Trần Thị Thanh
            [member_lastname] => Xuân
            [member_avata] => 26301582108523.jpg
            [member_createdate] => 2019-12-08 18:19:12
            [member_numpoint] => 2
            [member_isninja] => 0
            [faq_point] => 0
        )

    [7] => Array
        (
            [faq_id] => 507693
            [faq_title] => Tìm a,b,c biết a/3=b/8=c/5 và 2a +3b+ c=50
            [faq_code] => 
            [faq_content] => Tìm a,b,c biết
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-25 11:07:08
            [faq_num_answer] => 3
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 626992
            [user_username] => 
            [member_email] => 
            [member_firstname] => Giau Dao
            [member_lastname] => 
            [member_avata] => images/avatar/library/13.jpg
            [member_createdate] => 2020-03-25 11:04:48
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [8] => Array
        (
            [faq_id] => 504547
            [faq_title] => Tính 21/47+9/45+26/47+4/5
            [faq_code] => 
            [faq_content] => 
Thực hiện phép tính


            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-14 14:46:32
            [faq_num_answer] => 2
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 613380
            [user_username] => 
            [member_email] => 
            [member_firstname] => Thi Liem Nguyen
            [member_lastname] => 
            [member_avata] => images/avatar/library/1.jpg
            [member_createdate] => 2020-03-09 21:16:47
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [9] => Array
        (
            [faq_id] => 502947
            [faq_title] => Số học sinh của hai lớp 7A và 7B tỉ lệ 8 và 9. Số học sinh lớp 7B nhiều hơn số học sinh lớp 7A là 5 học sinh. Tính số học sinh lớp 7A và 7B ?
            [faq_code] => 
            [faq_content] => Nội dung trong đề bài kiểm tra
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-06 21:54:38
            [faq_num_answer] => 5
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 610922
            [user_username] => 
            [member_email] => phuongr639@gmail.com
            [member_firstname] => Bibi Phượng
            [member_lastname] => 
            [member_avata] => images/avatar/library/3.jpg
            [member_createdate] => 2020-03-05 21:41:01
            [member_numpoint] => 13
            [member_isninja] => 0
            [faq_point] => 0
        )

    [10] => Array
        (
            [faq_id] => 502822
            [faq_title] => Tìm x, y, z biết (x-1)/2=(y-2)/3=(z-3)/4 và 2x+3y-z=50
            [faq_code] => 
            [faq_content] => Giúp mình vs mọi ng ơi 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-03-06 13:27:29
            [faq_num_answer] => 1
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 611277
            [user_username] => 
            [member_email] => 
            [member_firstname] => Lam Huy
            [member_lastname] => 
            [member_avata] => images/avatar/library/18.jpg
            [member_createdate] => 2020-03-06 13:14:16
            [member_numpoint] => 8
            [member_isninja] => 0
            [faq_point] => 0
        )

    [11] => Array
        (
            [faq_id] => 499808
            [faq_title] => Tìm x biết x/10=3/2
            [faq_code] => 
            [faq_content] => Tìm x 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-02-25 19:36:11
            [faq_num_answer] => 3
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 601354
            [user_username] => 
            [member_email] => 
            [member_firstname] => Em
            [member_lastname] => Thương
            [member_avata] => 65671582634501.jpg
            [member_createdate] => 2020-02-21 09:31:49
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [12] => Array
        (
            [faq_id] => 490774
            [faq_title] => Tìm x, y biết (y^2-x^2)/5=y^2 x^2/7 và x^10×y^10=7776
            [faq_code] => 
            [faq_content] => Tìm x y biết (y^2-x^2)/5=y^2 x^2/7 và x^10×y^10=7776
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-01-29 20:10:01
            [faq_num_answer] => 3
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 572234
            [user_username] => 
            [member_email] => 
            [member_firstname] => Phạm Dưỡng
            [member_lastname] => 
            [member_avata] => images/avatar/library/15.jpg
            [member_createdate] => 2019-12-28 09:27:46
            [member_numpoint] => 33
            [member_isninja] => 0
            [faq_point] => 0
        )

    [13] => Array
        (
            [faq_id] => 488823
            [faq_title] => Chứng minh n+1/n+2 là phân số tối giản
            [faq_code] => 
            [faq_content] => 
Chứng minh n+1/n+2 là phân số tối giản
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-01-09 18:59:24
            [faq_num_answer] => 12
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 582476
            [user_username] => 
            [member_email] => 
            [member_firstname] => Khâm Ca
            [member_lastname] => Ca
            [member_avata] => 26031587530171.jpg
            [member_createdate] => 2020-01-09 18:56:59
            [member_numpoint] => 15
            [member_isninja] => 0
            [faq_point] => 0
        )

    [14] => Array
        (
            [faq_id] => 488000
            [faq_title] => Tìm giá trị nguyên của x để M=(2019x-2020)/(3x+2) có giá trị nhỏ nhất.
            [faq_code] => 
            [faq_content] => Ai giải giúp mik thì mik cảm mơn ạ:)) 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-01-06 20:47:39
            [faq_num_answer] => 2
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 580474
            [user_username] => 
            [member_email] => mlar0123456@gmail.com
            [member_firstname] => Trần Thanh Duy
            [member_lastname] => 
            [member_avata] => images/avatar/library/15.jpg
            [member_createdate] => 2020-01-06 20:27:37
            [member_numpoint] => 6
            [member_isninja] => 0
            [faq_point] => 0
        )

    [15] => Array
        (
            [faq_id] => 486696
            [faq_title] => Tìm giá trị lớn nhất của A=|x-3|| x+2|
            [faq_code] => 
            [faq_content] => Tìm giá trị lớn nhất
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2020-01-02 16:04:38
            [faq_num_answer] => 4
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 577153
            [user_username] => 
            [member_email] => 
            [member_firstname] => Kiều Trinh
            [member_lastname] => 
            [member_avata] => images/avatar/library/14.jpg
            [member_createdate] => 2020-01-02 16:02:39
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [16] => Array
        (
            [faq_id] => 484184
            [faq_title] => Tìm a, b với a, b khác 0 biết a+b/5=a-b/3=a×b/100
            [faq_code] => 
            [faq_content] => a b/5=a-b/3=a×b/100
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-25 20:59:33
            [faq_num_answer] => 1
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 563073
            [user_username] => 
            [member_email] => trongnghia.ttnn77@gmail.com
            [member_firstname] => Huong LE
            [member_lastname] => 
            [member_avata] => images/avatar/library/14.jpg
            [member_createdate] => 2019-12-24 06:10:12
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [17] => Array
        (
            [faq_id] => 482639
            [faq_title] => Tìm x, y biết x/4=y/7 và xy=112
            [faq_code] => 
            [faq_content] => Tìm x/4=y/7và xy=112 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-22 14:22:30
            [faq_num_answer] => 9
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 411726
            [user_username] => 
            [member_email] => 
            [member_firstname] => Công Lê
            [member_lastname] => 
            [member_avata] => images/avatar/library/7.jpg
            [member_createdate] => 2019-08-18 14:58:36
            [member_numpoint] => 16
            [member_isninja] => 0
            [faq_point] => 0
        )

    [18] => Array
        (
            [faq_id] => 482343
            [faq_title] => Tính diện tích mảnh đất hình chữ nhật biết chu vi 160m
            [faq_code] => 
            [faq_content] => Giải câu 10,11,12,13,16 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-21 10:19:47
            [faq_num_answer] => 1
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 535796
            [user_username] => 
            [member_email] => huynhtanphat21062007@gmail.com
            [member_firstname] => Huỳnh Tấn Phát
            [member_lastname] => 
            [member_avata] => images/avatar/library/17.jpg
            [member_createdate] => 2019-12-15 20:43:39
            [member_numpoint] => 6
            [member_isninja] => 0
            [faq_point] => 0
        )

    [19] => Array
        (
            [faq_id] => 477458
            [faq_title] => 3 cạnh của ∆ tỉ lệ với 3;4;5 biết chu vi bằng 36cm tính độ dài mỗi canh của ∆
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-12 20:49:19
            [faq_num_answer] => 4
            [faq_num_follow] => 2
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 525667
            [user_username] => 
            [member_email] => 
            [member_firstname] => Long Long
            [member_lastname] => 
            [member_avata] => images/avatar/library/8.jpg
            [member_createdate] => 2019-12-12 20:40:17
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [20] => Array
        (
            [faq_id] => 476678
            [faq_title] => Ba nhà sản xuất góp vốn theo tỷ lệ 4,5,6.. số tiền lãi được chia tỷ lệ với số đóng góp
            [faq_code] => 
            [faq_content] => Trên bài. Giải hộ tôi bài này....
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-11 14:55:34
            [faq_num_answer] => 1
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 521033
            [user_username] => 
            [member_email] => phanthinuong11071979@gmail.com
            [member_firstname] => Hương
            [member_lastname] => Giang
            [member_avata] => images/avatar/library/14.jpg
            [member_createdate] => 2019-12-11 14:23:57
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [21] => Array
        (
            [faq_id] => 476350
            [faq_title] => 1 máy gặt lúa làm việc bằng 60 người trong 8 giờ
            [faq_code] => 
            [faq_content] => một máy gặt lúa làm việc bằng 60 người trong 8 giờ. hai máy gặt lúa làm xong công việc ở một cánh đồng trong 12 giờ. hỏi 60 người làm trong bao lâu?
            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-12-10 20:05:45
            [faq_num_answer] => 0
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 518773
            [user_username] => 
            [member_email] => 
            [member_firstname] => Lan Hien Phạm
            [member_lastname] => 
            [member_avata] => images/avatar/library/14.jpg
            [member_createdate] => 2019-12-10 19:55:07
            [member_numpoint] => 1
            [member_isninja] => 0
            [faq_point] => 0
        )

    [22] => Array
        (
            [faq_id] => 472226
            [faq_title] => Tìm x biết  |5(2x 3)| |2(2x 3)| |2x 3|=16
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-11-29 17:43:45
            [faq_num_answer] => 6
            [faq_num_follow] => 1
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 480300
            [user_username] => 
            [member_email] => 
            [member_firstname] => Nhi Tây
            [member_lastname] => 
            [member_avata] => images/avatar/library/1.jpg
            [member_createdate] => 2019-11-10 15:42:21
            [member_numpoint] => 2
            [member_isninja] => 0
            [faq_point] => 0
        )

    [23] => Array
        (
            [faq_id] => 470892
            [faq_title] => Tìm x biết 5/6-3x/7=1/2
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-11-21 21:39:07
            [faq_num_answer] => 5
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 489604
            [user_username] => 
            [member_email] => 
            [member_firstname] => Yuri Yuri Yuri
            [member_lastname] => 
            [member_avata] => 55981574692755.jpg
            [member_createdate] => 2019-11-20 21:29:37
            [member_numpoint] => 67
            [member_isninja] => 0
            [faq_point] => 0
        )

    [24] => Array
        (
            [faq_id] => 470890
            [faq_title] => Tìm x, y biết 5x=2y và 3x-y=2
            [faq_code] => 
            [faq_content] => 

            [subject_code] => toan-hoc
            [grade_code] => lop-7
            [faq_createdate] => 2019-11-21 21:37:38
            [faq_num_answer] => 5
            [faq_num_follow] => 0
            [faq_flag] => 0
            [faq_status] => 1
            [faq_reason] => 
            [member_id] => 489604
            [user_username] => 
            [member_email] => 
            [member_firstname] => Yuri Yuri Yuri
            [member_lastname] => 
            [member_avata] => 55981574692755.jpg
            [member_createdate] => 2019-11-20 21:29:37
            [member_numpoint] => 67
            [member_isninja] => 0
            [faq_point] => 0
        )

)