SOLUTION: Pat and Blair mow lawns together. When Pat mows the lawn for Mr. Rodriguez, it takes 100 minutes. When Pat and Blair mow the lawn for Mr. Rodriguez together, they get the job done

Question 920937: Pat and Blair mow lawns together. When Pat mows the lawn for Mr. Rodriguez, it takes 100 minutes. When Pat and Blair mow the lawn for Mr. Rodriguez together, they get the job done in 40 minutes. How long will it take Blair to mow the lawn for Mr. Rodriguez alone?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Rate for Pat plus rate for Blair equals their combined rate.
Use rates in the form of LAWNS per MINUTE.

IF P is Pat's rate, and B is Blair's rate, then if you know their combined rate, c, .
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