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MGSM / 卡洛斯和本吉在海滩上。卡洛斯以每小时 30 美元的价格租了一艘独木舟,本吉以每小时 18 美元的价格租了一艘香蕉船筏。如果卡洛斯用船 3 小时,本吉用筏 5 小…

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卡洛斯和本吉在海滩上。卡洛斯以每小时 30 美元的价格租了一艘独木舟,本吉以每小时 18 美元的价格租了一艘香蕉船筏。如果卡洛斯用船 3 小时,本吉用筏 5 小时,他们一共要付多少租金?

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