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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: a) 3/2 x-2 1/3 = -1/4 b) |x/7-3/4| = 5/14

Home/ Toán Lớp 7: a) 3/2 x-2 1/3 = -1/4 b) |x/7-3/4| = 5/14

Toán Lớp 7: a) 3/2 x-2 1/3 = -1/4 b) |x/7-3/4| = 5/14

Tháng Mười 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: a) 3/2 x-2 1/3 = -1/4 b) |x/7-3/4| = 5/14

Comments ( 2 )

  1. lyly98
    lyly98
    26 Tháng Mười, 2022 at 1:34 sáng
    Reply
    a) 3/2 x – 2 1/3 = -1/4
    3/2 x – 7/3 = -1/4
    3/2 x = -1/4 + 7/3
    3/2 x = 25/12
           x = 25/12 : 3/2
           x = 25/18
    Vậy x = 25/18
    ______________________________
    | x/7 – 3/4| = 5/14
    => x/7 – 3/4 = 5/14  hoặc  x/7 – 3/4 = -5/14
    TH1 :
    x/7 – 3/4 = 5/14
    x/7 = 5/14 + 3/4
    x/7 = 31/28
    => x = (7 . 31)/28 = 31/4 = 7,75
    TH2 :
    x/7 – 3/4 = -5/14
    x/7 = -5/14 + 3/4
    x/7 = 11/28
    => x = (7 . 11)/28 = 11/4 = 2,75
    Vậy x = 7,75 ; x = 2,75

  2. kimoanh34
    kimoanh34
    26 Tháng Mười, 2022 at 1:34 sáng
    Reply
     đây nha

    toan-lop-7-a-3-2-2-1-3-1-4-b-7-3-4-5-14

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222-9+11+12:2*14+14 = ? ( )

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