SOLUTION: how much of a 60% salt solution must be mixed with 108 liters of an 80% salt solution to get a 75% salt solution?

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Question 837160: how much of a 60% salt solution must be mixed with 108 liters of an 80% salt solution to get a 75% salt solution?
Answer by Alan3354(69443) About Me  (Show Source):
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how much of a 60% salt solution must be mixed with 108 liters of an 80% salt solution to get a 75% salt solution?
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108*80 + x*60 = 75*(108 + x)