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(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42
人气:134 ℃ 时间:2020-04-02 06:05:58
解答
(1+0.8%)x+(1+1.1%)×(42-x)=(1+1%)×42
1.008x+1.011*42-1.011x=1.01*42
-0.003x=-0.001*42
x=14
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