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数学
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(x-1)/(2-x)=1/(x-2)+1怎么算?
人气:121 ℃ 时间:2020-03-20 09:17:42
解答
(x-1)/(2-x)=1/(x-2)+1
两边同乘以x-2
-(x-1)=1+x-2
-x+1=x-1
2x=2
x=1
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