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最佳答案:设支出比(今年/去年)为y,去年的收入为x ,则今年的收入为1.15x.则y=(1.15x-9500)/(x-5000) 这个就是个一元一次方程了 只能列出方程
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最佳答案:1.Chris. This will graduate from university, and he always dreams of becoming a
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最佳答案:I'm Li Mei,who is a 26-year-old girl.I saw a advertisement which said a company