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

Toán Lớp 6: Tim x ( -1 2/3 x + 12/24) : 1/-7 =70%

Toán Lớp 6: Tim x
( -1 2/3 x + 12/24) : 1/-7 =70%

Comments ( 2 )

  1. ( -1 2/3 x + 12/24 ) : 1/-7 = 70%
    ( -5/3 x + 1/2 )  = 7/10 . -1/7
    -5/3 x + 1/2 = -1/10
    -5/3 x = -1/10 – 1/2
    -5/3 x = -1/10 – 5/10
    -5/3 x = -6/10
    -5/3 x = -3/5
    x = -3/5 : -5/3
    x = -3/5 . 3/-5
    x = (-9)/-25
    x=9/25
    Vậy x = 9/25
     

  2. (-1 2/3 x + 12/24) : 1/-7 = 70%
    -1 2/3 x + 1/2 = 7/10 . 1/-7
    -1 2/3 x + 1/2 = -1/10
    -1 2/3 x = -1/10 – 1/2
    -1 2/3 x = -3/5
    x = -3/5 : -1 2/3
    x = -3/5 : -5/3
    x = 9/25

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

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