SOLUTION: Can you help me with this equation " On printing press alone can produce in 6 hours alond, a second press can produce in 9 hours alone, a third press can produce in 12 hours alone.

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Question 860191: Can you help me with this equation " On printing press alone can produce in 6 hours alond, a second press can produce in 9 hours alone, a third press can produce in 12 hours alone. If all three presses run together- how long would it take to prodiuce a newspaper?
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

Let x represent time  If all three presses run together-

  |Multiplying thru by 36x so as all denominators = 1

   6x + 4x + 3x = 36

         13x = 34

           x = 34/13   0r  2 8⁄13   

 

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