SOLUTION: The office jet printer can copy Lisa's dissertation in 20 min. The Laser jet printer can copy the same document in 12 min. If the two machines work together, how long would they ta

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Question 585061: The office jet printer can copy Lisa's dissertation in 20 min. The Laser jet printer can copy the same document in 12 min. If the two machines work together, how long would they take to copy the dissertation?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x/20+x/12=1
x=15/2= 7.5