SOLUTION: Working together, it takes Andy and Sam 7 hours to build a fence. Alone, it takes Andy twice the time as it takes Sam. How long does it take each working alone?
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Question 856739: Working together, it takes Andy and Sam 7 hours to build a fence. Alone, it takes Andy twice the time as it takes Sam. How long does it take each working alone? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 1/(2s)+1/s=1/7
1/(2s)+2/(2s)=1/7
3/(2s)=1/7
21/14s=2/14
a=2s=21
s=10.5
1/10.5+1/21=1/7
2/21+1/21=1/7
3/21=1/7
ok
