Question
It takes Roshel 7 hours to sew a blouse by herself. If Marion helps her, they will take 4 hours to sew the blouse. How long will Marion take to sew the blouse by herself? Express your answer in mixed number.
3 m

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It takes Roshel 7 hours to sew a blouse by herself. If Marion helps her, they will take 4 hours to sew the blouse. How long will Marion take to sew the blouse by herself? Express your answer in mixed number.