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

Toán Lớp 7: Tìm x: a) x+3,5 – 4/7=1/2 – 4 1/8

Toán Lớp 7: Tìm x:
a) x+3,5 – 4/7=1/2 – 4 1/8

Comments ( 2 )

  1. a) x + 3,5 – 4/7 = 1/2 – 4 1/8
    x + 7/2 – 4/7 = 1/2 –  33/8
    x + 7/2 – 4/7 = -29/8
    x + 7/2 = -29/8 + 4/7
    x + 7/2=-171/56
    x = -171/56 –  7/2
    x= -171/56 – 196/56
    x= -367/56
    Vậy x = -367/56
    #caty09

  2. Giải đáp:
     x=-367/56
    Lời giải và giải thích chi tiết:
    a) x+3,5 – 4/7 = 1/2 – 4 1/8
    x+7/2 – 4/7 = 1/2 – 33/8
    x+7/2 – 4/7 = -29/8
    x+7/2          =-29/8 + 4/7
    x+7/2          =-171/56
    x                   =-171/56 – 7/2
    x                   =-367/56

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

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