SOLUTION: The OfficeJet printer can copy Maria's dissertation in 10 min. The LaserJet printer can copy the same document in 22 min. If the two machine work together, how long would they take

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Question 381467: The OfficeJet printer can copy Maria's dissertation in 10 min. The LaserJet printer can copy the same document in 22 min. If the two machine work together, how long would they take to copy the dissertation?
Found 2 solutions by checkley79, bamb62:
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1/10+1/22=1/x
(10+22)/10*22=1/x
32/220=1/x
32x=220
x=220/32
x=6.875 minutes ans.

Answer by bamb62(1) About Me  (Show Source):