Questions on Algebra: Proportions answered by real tutors!

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Question 153070: It takes a computer 8 days to print all of the letters for a sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take both computers working on it.: It takes a computer 8 days to print all of the letters for a sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take both computers working on it.
Answer by checkley77(3408) About Me  (Show Source):
You can put this solution on YOUR website!
8*5/(8+5)=40/13=3.077 hours to print the letters working together.