SOLUTION: A and B can paint a barn in 3 days. A can do it in 5 days.How many days would it take B to do this job alone?

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Question 618702: A and B can paint a barn in 3 days. A can do it in 5 days.How many days would it take B to do this job alone?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A and B can paint a barn in 3 days. A can do it in 5 days.

How many days highlight%28x%29 would it take B to do this job alone?

Note:PER day is Key to the Set up

 1/5 + 1/x = 1/3         |Multiplying thru by 15x so as all denominators = 1

  3x + 15 = 5x

       15 = 2x

       7.5 = x, days it would take B to do this job alone