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(X-18)/X=0.25,請(qǐng)問(wèn)X怎么求?。柯闊┝幸幌鹿?/p>
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速問(wèn)速答你好,(X—18)/X=0.25
移項(xiàng)就是,X—18=0.25X
再移項(xiàng),就是?X—0.25X=18
X=18/(1—0.25)
2022 06/01 11:16
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