6(x-2)-7(x-1)=3(1-x)等于多少?
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6(x-2)-7(x-1)=3(1-x)等于多少?
6(x-2)-7(x-1)=3(1-x)等于多少?
6(x-2)-7(x-1)=3(1-x)等于多少?
6(x-2)-7(x-1)=3(1-x)
6x-12-7x+7=3-3x
6x-7x+3x=3+12-7
2x=8
x=4
去括号: 6x-12-7x+7=3-3x
移项合并:2x=8
解得: x=4.