SOLUTION: If i can do a job in 4h and we can do the same job in 2h, how long can you do the job alone?

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Question 469840: If i can do a job in 4h and we can do the same job in 2h, how long can you do the job alone?
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
2%2F4%2B2%2Fx=1
2x%2F4x%2B8%2F4x=1
%282x%2B8%29%2F4x=1 cross multiply
2x%2B8=4x
8=2x divide each side by 2
4=x so if we do it alone we can both get it done in 4 hours each, but if we do it together we get it done in 2 hours. So you can do it alone in 4.