SOLUTION: What quantity of a 70% acid solution must be mixed with a 50% solution to produce 200 mL of a 60% solution?

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Question 785371: What quantity of a 70% acid solution must be mixed with a 50% solution to produce 200 mL of a 60% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
This is the same general problem but only a different example like, http://www.algebra.com/algebra/homework/word/mixtures/Mixture_Word_Problems.faq.question.785363.html

The exact same analysis and formulas describe it.