80本语文书和100本数学书总价相等,已知每本语文书比每本数学书贵5分钱,语文书和数学书的单价各是多少?
人气:141 ℃ 时间:2019-08-20 06:54:17
解答
设数学书每本x分100x=80(x+5)
100x=400+80x
20x=400
x=20
20+5=25
单价各是20分和25分,望采纳,祝你学习进步
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