SOLUTION: Linda can stuff 1000 envelopes in 6 hours. If Laura helps her, they can both stuff 1000 envelopes in 5 1/2 hours. How long would it take Laura to stuff 12000 envelopes by herself

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Question 132383: Linda can stuff 1000 envelopes in 6 hours. If Laura helps her, they can both stuff 1000 envelopes in 5 1/2 hours. How long would it take Laura to stuff 12000 envelopes by herself?
Please solve in algebra Tx!!
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Linda can do 1/6 of the job in 1 hr.
Laura can do 2/11 of the job in 1 hr.
1/6 + 2/11
=11/66 + 12/66 = 23/66 of the job together in 1 hr.
So, 66/22 = 3 hrs to do the job together.
.
Ed