SOLUTION: X, Y and Z can do a job in 10 days. X leaves after working with Y and Z for 4 days, and then Y and Z completes the remaining work in 10 more days. In how many days, X alone can do

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Question 294871: X, Y and Z can do a job in 10 days. X leaves after working with Y and Z for 4 days, and then Y and Z completes the remaining work in 10 more days. In how many days, X alone can do the work.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
10/x+10/y+10/z=1
4/10+10/y+10/z=1
10/x=2/5
2x=50
x=25
x can do the job in 25 days