SOLUTION: A homeowner estimates that it will take her 7 days to roof her house. A professional roofer estimates that he could roof the house in 6 day(s). How long will it take if the homeown
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Question 837427: A homeowner estimates that it will take her 7 days to roof her house. A professional roofer estimates that he could roof the house in 6 day(s). How long will it take if the homeowner helps the roofer?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/7+1/6=1/x
6/42+7/42=13/42
42/13=x
3.23 =x
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