4.8:4=x:3.6等于多少
买同样的4本书的练习本用了4.8元，3.6元可以卖多少本这样的书。
用比例方程算
人气：403 ℃ 时间：2020-04-04 11:06:26
解答
4.8:4=x:3.6
4x=4.8*3.6
x=4.8*0.9
x=4.32
4：4.8=x:3.6
4.8x=4*3.6
x=3
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