SOLUTION: A 15% acid solution is mixed with a 70% acid solution to produce 120 liters of a solution that is 40% acid. How much of each solution was used to create the mixture?

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Question 378605: A 15% acid solution is mixed with a 70% acid solution to produce 120 liters of a solution that is 40% acid. How much of each solution was used to create the mixture?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
x(70%) + (120 - x)(15%) = 120(40%)