SOLUTION: Frank can do a job in 12 hours,and Mary can do the same job in 6 hours. Frank and Mary start the work together but Mary leaves after 2 hours. How many hours will Frank take to fin

SOLUTION: Frank can do a job in 12 hours,and Mary can do the same job in 6 hours. Frank and Mary start the work together but Mary leaves after 2 hours. How many hours will Frank take to fin

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Question 807911: Frank can do a job in 12 hours,and Mary can do the same job in 6 hours. Frank and Mary start the work together but Mary leaves after 2 hours. How many hours will Frank take to finish the remainder of the job(after Mary has left)?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x/12+x/6=1
x=4
They do half the job together in 2 hours
Frank can do half the job in 6 hours.

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