一个人在书店购买了一本书和一本杂志英文翻译
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5
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155
李老根记
回答数
5
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155
李老根记
留留恋恋
jgnallen，你好：书价相差：39－21＝18（元）因为看错书价，杂志没问题，可设书价为10a＋b，看错后为10b＋a，根据题意有：10a＋b－10b－a＝18 9a－9b＝18 a－b＝2 所以十位与个位相差2，那么以书价有可能是3
香蕉2015
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小甜甜不赖你 5人参与回答 2024-06-17 10x+y)纠正后的书价应为10y+x 则杂志的价格为39-（10y+x）等量关系建立了21-(10x+y)=39-（10y+x）得y-x=2 根据实际情况代数
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