SOLUTION: Richard can build a dog house in 3 days. Art can build a doghouse in 6 days. If they work together, how long will it take to build a doghouse?

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Question 823379: Richard can build a dog house in 3 days. Art can build a doghouse in 6 days. If they work together, how long will it take to build a doghouse?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/3+1/6=1/x
2/6+1/6=1/x
1/2=1/x
x=2
check
2/3+2/6=1
ok