Question
Glen and Lee, together, can clean a living room in 3 hours. If Glen is cleaning the living room alone, he can only complete the task in 7 hours. How long will Lee take to clean a living room all by himself? Express your answer in mixed number.
3 m

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Glen and Lee, together, can clean a living room in 3 hours. If Glen is cleaning the living room alone, he can only complete the task in 7 hours. How long will Lee take to clean a living room all by himself? Express your answer in mixed number.