SOLUTION: You can do a job in 12 minutes and your friend takes 15 minutes. How long will it take both of you to complete the job working together?

SOLUTION: You can do a job in 12 minutes and your friend takes 15 minutes. How long will it take both of you to complete the job working together?

Algebra.Com

Question 444935: You can do a job in 12 minutes and your friend takes 15 minutes. How long will it take both of you to complete the job working together?
Answer by rwm(914) (Show Source): You can put this solution on YOUR website!
x/12+x/15=1
20x/12+20x/15=20
5x/3+4x/3=20
9x=60
x=60/9
x=20/3
x= 6 2/3 minutes

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