Question
Jack and Sam, together, can clean a house in 5 hours. If Jack is cleaning the house alone, he can only complete the task in 9 hours. How long will Sam take to clean a house all by himself? Express your answer in mixed number.
3 m

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Jack and Sam, together, can clean a house in 5 hours. If Jack is cleaning the house alone, he can only complete the task in 9 hours. How long will Sam take to clean a house all by himself? Express your answer in mixed number.