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MIT 18.06 Linear Algebra, Spring 2010
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OpenStudy (anonymous):
The manager of a fish store has water that is 15% salt and water and water that is 20% salt. He needs to fill an aquarium with 5 gallons of water that is 30% salt. How many gallons of each type does he need? We are using linear equations in algebra. I keep coming up with one of the answers as 15 for my y value and that can't be right.
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