SOLUTION: Randy Howe can paint his house in 9 hours. His sister Candy can paint the house in 15 hours. How many hours will it take them to paint the house if they work together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Randy Howe can paint his house in 9 hours. His sister Candy can paint the house in 15 hours. How many hours will it take them to paint the house if they work together?      Log On


   

Question 296951: Randy Howe can paint his house in 9 hours. His sister Candy can paint the house in 15 hours. How many hours will it take them to paint the house if they work together?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x/9+x/15=1
5x/45+3x/45=
8x/45=1
8x=45
x=45/8=5 5/8=5.625 hrs