SOLUTION: How many liters of a 10% acid solution must be mixed with 5 liters of a 25% acid solution to give a 15% solution?

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Question 250289: How many liters of a 10% acid solution must be mixed with 5 liters of a 25% acid solution to give a 15% solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.10x+.25(5)=.15(x+5)