SOLUTION: How many gallons of a 8% salt solution must be mixed with 60 gallons of a 12% solution to obtain a 10% solution?

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Question 796480: How many gallons of a 8% salt solution must be mixed with 60 gallons of a 12% solution to obtain a 10% solution?
Answer by Alan3354(69443) About Me  (Show Source):
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How many gallons of a 8% salt solution must be mixed with 60 gallons of a 12% solution to obtain a 10% solution?
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10 is the average of 8 & 12, so it's equal parts.