SOLUTION: working alone ,amy can clean an attic in seven hours. Jack can clean the same attiv in six hours. If they worked together how long would it take?

Question 402056: working alone ,amy can clean an attic in seven hours. Jack can clean the same attiv in six hours. If they worked together how long would it take?
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
Let's have x represent the number of hours it will take 2 people working together to complete the job. Here's the equation we can set up:
1/7(x)+1/6(x)=1 (whole job)
Multiply this by 42 to get:
6x+7x=42
Combine like terms and divide by 13 to get:
x=42/13 or 3 3/13 hours working togeter to clean the attic.
Make sense?
RJ
www.math-unlock.com

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