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【OG20-P273-232题】If a certain vase contains only roses and tulips, how many tulips are there in the vase?
(1 )The number of roses in the vase is 4 times the number of tulips in the vase .
(2)There is a total of 20 flowers in the vase.
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当前版本由
Helen 更新于2018-09-06 14:00:05 感谢由
Helen 对此题目的解答所做出的贡献。
条件1:r=4t,不充分
条件2:r+t=20,不充分
结合:r=16,t=4,充分
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