SOLUTION: How many liters of 40% acid solution must be mixed with 10 liters of 65% solution to get 45% acid solution?

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Question 549134: How many liters of 40% acid solution must be mixed with 10 liters of 65% solution to get 45% acid solution?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(40%)(x) + (65%)(10) = (45%)(10 + x)