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

Toán Lớp 7: x+1 1 =–= — x-5 2 x-5 2

Toán Lớp 7: x+1 1
—–= —
x-5 2
x-5 2

Comments ( 1 )

  1. Lời giải chi tiết:
    (x+1)/(x-5)=1/2
    =>2(x+1)=1(x-5)
    =>2x+2=x-5
    =>2x+2-x+5=0
    =>(2x-x)+(2+5)=0
    =>x+7=0
    =>x=0-7
    =>x=-7
    Vậy x=-7

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