SOLUTION: A 10% salt solution is to be mixed with pure water to produce 75 gallons of a 3% salt solution. How much of each are needed?

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Question 825856: A 10% salt solution is to be mixed with pure water to produce 75 gallons of a 3% salt solution. How much of each are needed?
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
In a practical situation, density might be too significant to ignore. If percents are as mass per volume, (indicated as %w/v), the the lesson on two-part mixtures, "both amounts unknown", in my profile will help.
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