SOLUTION: Three computers can print out a task in 14 min, 21 min, and 42 min, respectively. How long would it take to complete the task with all three computers working?

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Question 812522: Three computers can print out a task in 14 min, 21 min, and 42 min, respectively. How long would it take to complete the task with all three computers working?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x/14+x/21+x/42=1
x = 7
check
7/14+7/21+7/42=1
1/2+1/3+1/6=1
3/6+2/6+1/6=1
6/6=1
1=1
ok