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老师.0.58=(0.5x+0.7y)/(x+y)求X比y怎么求
人气:415 ℃ 时间:2020-04-12 17:41:55
解答
0.58=(0.5x+0.7y)/(x+y)
0.58(x+y)=0.5x+0.7y
0.08x=0.12y
x/y=0.12/0.08=3/2
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