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April 18, 2014

Homework Help: Math Algebra , high school

Posted by Gina on Thursday, December 13, 2012 at 10:14pm.

A biologist has three salt solutions: some 5% solution, some 15% solution, and some 25% solution. She needs to mix some of each to get 50 liters of 20% solution. She wants to us twice as much of the 5% solution as the 15% solution. How much of each solution should she use? How do I set it up using 3 varibles

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