SOLUTION: Fred can paint a house in 12 days and John can paint a house in 17 days. If they start painting together and John leaves after 3 days, how long will it take Fred to finish

SOLUTION: Fred can paint a house in 12 days and John can paint a house in 17 days. If they start painting together and John leaves after 3 days, how long will it take Fred to finish

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Question 861482: Fred can paint a house in 12 days and John can paint a house in 17 days. If they start painting together and John leaves after 3 days, how long will it take Fred to finish
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
3/12+3/17+x/12=1
x/12+29/68 = 1
x = 117/17
x = 6.8824
BTW
1/12+1/17=1/x
x is how long it would take them together
x = 204/29
x = 7.0345
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