a family made a down payment of $75 and borrowed the balance on a set of encyclopedios that cost $400. The balance with interest was paid in 23 monthly payments of $16 each and a final payment of $9. The amount of interest paid was what percent of the amount borrowed?(key: 16%) 请教大家怎么做？谢谢！
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发表于 2010-7-20 19:09:32
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