SOLUTION: Alex can complete a work in 5 hours and Ben can complete the same work in 10 hours .How many hours will they both take to complete the job together>?

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Question 678455: Alex can complete a work in 5 hours and Ben can complete the same work in 10 hours .How many hours will they both take to complete the job together>?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1/5+1/10=1/x
(2+1)/10=1/x
3/10=1/x
3x=10
x=10/3
x=3.33 hours.