SOLUTION: Julie can paint a fence by herself in 12 hours. With Betsy’s help, it takes only 5 hours. How long would it take Betsy by her self.

Algebra ->  Equations -> SOLUTION: Julie can paint a fence by herself in 12 hours. With Betsy’s help, it takes only 5 hours. How long would it take Betsy by her self.       Log On


   

Question 323779: Julie can paint a fence by herself in 12 hours. With Betsy’s help, it takes only 5 hours. How long would it take Betsy by her self.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
1/12+1/x=1/5
1/x=1/5-1/12
1/x=(12-5)/60
1/x=7/60
7x=60
x=60/7
x=8.57 hrs, ans. for Betsy's time working alone..