Hi,

Let x represent time for Machine Y working along to finish the task 

      |Multiplying thru by 10x so as all denominators = 1

 2x + 10 = 5x

      10 = 3x

     x = 3 1⁄3 hrs, time for Machine Y working along to finish the task  

Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
 1/5+1/x=1/2

2/10+1/x=5/10

1/x=3/10

x=10/3=3 1/3 MINUTES not hours 

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