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数学
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4x+2(60-x)=190怎么算?过程写出来.
人气:217 ℃ 时间:2020-06-15 03:05:51
解答
4x+2(60-x)=190
4x+120-2x=190
4x-2x=190-120
2x=70
x=35
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