SOLUTION: If it takes Matt 20 minutes to sort the mail and 12 minutes if he works with Ryan, how long will it take Ryan to sort the mail alone?
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Question 908981: If it takes Matt 20 minutes to sort the mail and 12 minutes if he works with Ryan, how long will it take Ryan to sort the mail alone? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 12/20+12/x=1
6/10+12/x=1
12/x=4/10
12/x=12/30
x=30
check
12/20+12/30=1
6/10+4/10=1
10/10=1
1=1
