SOLUTION: How many liters of a 25% acid solution must be added to 20 liters of a 45% acid solution to get a 35% acid solution?

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Question 1012169: How many liters of a 25% acid solution must be added to 20 liters of a 45% acid solution to get a 35% acid solution?
Answer by Alan3354(69443) About Me  (Show Source):
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How many liters of a 25% acid solution must be added to 20 liters of a 45% acid solution to get a 35% acid solution?
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35 is the average of 25 & 45, so it's equal amounts.