买甲乙两种戏票共20张,用去45元,已知甲种票每张3元,乙种票每张2元,两种票各买
人气:208 ℃ 时间:2020-04-12 21:58:07
解答
ab9665297 ,你好:
假设全买甲种票要:
20×3=60(元)
比实际多了:
60-45=15(元)
乙种票买了:
15÷(3-2)=15(张)
甲种票买了:
20-15=5(张)
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