SOLUTION: A chemist has one solution which is 20% saline and a second solution which is 65% saline. How many gallons of each solution should be mixed together to get 120 gallons of a solutio

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Question 295824: A chemist has one solution which is 20% saline and a second solution which is 65% saline. How many gallons of each solution should be mixed together to get 120 gallons of a solution which is 50% saline?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.2x+.65y=120*.5
x+y=120
x=40 y=80
40 gallons of 20%