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数学
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(50+6.8x)/(90+15.3x)=0.492如何解x
人气:341 ℃ 时间:2020-07-02 03:03:51
解答
50+6,.8x=0.492*(90+15.3x)
50+6,.8x=44.28+7.5276x
5.72=0.7276x
x=7.9
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