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[求助]
求解一道GRE 數(shù)學(xué)題
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There was a $25 discount on every purchase of $75there was a 10% charge on shipping which was added before the discount and 20% sales tax after the discount was added. If john paid total $300, whatwas the original amount of purchase if no sales tax was added per $75 請(qǐng)G友們幫忙解釋一下這道題,是怎么算的(答案是240) |
金蟲(chóng) (正式寫(xiě)手)

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