SOLUTION: a printing shop starts a job at 10 a.m. on press A. Using this press alone, it would take 10 hours to complete the job. At 2 p.m. press B is also turned on, and both presses togeth

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Question 857511: a printing shop starts a job at 10 a.m. on press A. Using this press alone, it would take 10 hours to complete the job. At 2 p.m. press B is also turned on, and both presses together finish the job at 5 p.m. How long would it take press B to do the job alone?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
already answered
10 hours
7/10+3/x=1
x=10