SOLUTION: If a worker can do a job in 10 hours, and another can do that job in 7, how long would it take both of them to do that job together?

SOLUTION: If a worker can do a job in 10 hours, and another can do that job in 7, how long would it take both of them to do that job together?

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Question 461051: If a worker can do a job in 10 hours, and another can do that job in 7, how long would it take both of them to do that job together?
Answer by rwm(914) (Show Source): You can put this solution on YOUR website!
x/10+x/7=1
7x+10x=70
17x=70
x=70/17

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