SOLUTION: An office has two envelope-filling machines. Working together, they can fill a batch of envelopes in 2 hours. Working separately, it will take the second machine 1 hour longer than

Question 1127323: An office has two envelope-filling machines. Working together, they can fill a batch of envelopes in 2 hours. Working separately, it will take the second machine 1 hour longer than the first machine to fill a batch of envelopes. How long will it take each machine to fill a batch of envelopes by themselves? Give your answer correct to the nearest minute.
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
, time for first machine to do 1 job, alone
, time for second machine to do 1 job, alone

------both machines together do 1 job in 2 hours.
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