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数学
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X-40%X-(40%X+10)=30
这个方程怎么解
人气:273 ℃ 时间:2020-05-26 07:37:03
解答
原方程去掉括号为:X-0.4X-0.4X-10=30
移项、合并同类项:0.2X=40
答案:X=200
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