SOLUTION: Working together, Amy and Bob can complete a job in 12 hours, Working lone, it takes Amy 4/3 as much as bob to do the job. How long will it take each to do the job, working alone?

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Question 1108166: Working together, Amy and Bob can complete a job in 12 hours, Working lone, it takes Amy 4/3 as much as bob to do the job. How long will it take each to do the job, working alone?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Bob, y hours for 1 job
Amy, (4/3)y hours for 1 job

1%2F%28%284%2F3%29y%29%2B1%2Fy=1%2F12
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3%2F%284y%29%2B1%2Fy=1%2F12

12y%283%2F%284y%29%2B1%2Fy%29=12y%2F12

9%2B12=y

highlight%28y=21%29---------Bob does 1 job in 12 hours, alone.

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%284%2F3%29%2A21
highlight%2828%29----------Amy can do 1 job alone in 28 hours.