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

Toán Lớp 7: Tìm x biết : $\frac{z-1}{3}$ = $\frac{2-x}{-2}$ GIÚP VS Ạ .

Toán Lớp 7: Tìm x biết :
$\frac{z-1}{3}$ = $\frac{2-x}{-2}$
GIÚP VS Ạ .

Comments ( 2 )

  1. \frac{x-1}{3}=\frac{2-x}{-2}
    =>(x-1).(-2)=(2-x).3
    =>-2x+2=6-3x
    =>-2x+3x=6-2
    =>x=4
    Vậy x=4

  2. Lời giải chi tiết:
    (x-1)/3=(2-x)/(-2)
    =>-2(x-1)=3(2-x)
    =>-2x+2=6-3x
    =>-2x+3x=6-2
    =>x=4
    Vậy x=4

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

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