SOLUTION: Trent can deliver his newspapers in 30 minutes. It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work together?

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Question 248633: Trent can deliver his newspapers in 30 minutes. It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work together?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Trent's rate of delivering papers plus
Lois's rate of delivering papers equals
their rate working together.
In words:
(1 route)/(Trent's time) + (1 route)/(Lois's time) = (1 route)/(time working together)
1%2F30+%2B+1%2F20+=+1%2Fx
Multiply both sides by 60x
2x+%2B+3x+=+60
5x+=+60
x+=+12 minutes