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3.6/[(x/4.5)*(1-1/4)]-3.6/(x/4.5 )=0.2
人气:495 ℃ 时间:2020-05-01 03:16:49
解答
4.8/(x/4.5)-3.6/(x/4.5)=0.2
1.2/(x/4.5)=0.2
x/4.5=6
x=6×4.5
x=27
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