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试题详情

There are a total of 104 books. 80 are paperback and 20 Chinese books; the number of non-paperback non-Chinese books is 3 times the number of paperback Chinese books. How many books are paperback Chinese books?
答案:2.0

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老师 可以帮忙解释下这道题么?麻烦了 不知道该怎么做 谢谢

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