7(x-1)=2x+2怎么解
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7(x-1)=2x+2怎么解
7(x-1)=2x+2怎么解
7(x-1)=2x+2怎么解
7x-7=2x+2
7x-2x=2+7
5x=9
x=9÷5
x=1.8
一刻永远523
7(x-1)=2x+2
7x-7=2x+2
7x-2x=2+7
5x=9
x=9/5
解
7(x-1)=2x+2
7x-7=2x+2
7x-2x=2+7
5x=9
x=9/5