SOLUTION: Susan and Mary working together can rake the lawn in 2 hours. Susan can do the job alone in 3 hours. How long would it take Mary to rake the lawn alone?

Question 31569: Susan and Mary working together can rake the lawn in 2 hours.
Susan can do the job alone in 3 hours.
How long would it take Mary to rake the lawn alone?
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
let mary's rate be x
Equation:

Multiply the whole equation by 6 to remove the fractions and simplify:

6=3x-2x
x=6
Hence, it would take her 6 hours to do it alone.
Paul.
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