SOLUTION: It takes Carolyn 4 hour to type a final exam. It takes Elise 3 hour to do the same job. How long would it take them, working together, to do the typing?
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Question 290204: It takes Carolyn 4 hour to type a final exam. It takes Elise 3 hour to do the same job. How long would it take them, working together, to do the typing?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x/4+x/3=1
3x+4x=12
7x=12
x=12/7 1 5/7 hours together
check
12/7/4=3/7
12/7/3=4/7
Carolyn does 3/7 and Elise does 4/7 of the work.
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