x-3分之1-x=6分之x+2 -1
x- 3分之1-x = 6分之x+2 -1
人气:221 ℃ 时间:2020-02-03 20:53:42
解答
两边乘以6得
6x-2(1-x)=x+2-6
6x-2+2x=x+2-6
7x=-2
x=-2/7
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