(10%-8%)/(10%-x)=(80-100)/(80-90),求x值

竹林月_713 |浏览666次
收藏|2021/06/21 21:26

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2021/06/21 21:34

(10%-8%)/(10%-x)=(80-100)/(80-90)(2%)/(10%-x)=(-20)/(-10)(2%)/(10%-x)=2(2%)/2=10%-x 1%=10%-x x =10%-1%=9%

老三木l

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