SOLUTION: Rachel has 25% acid solution and a 50% acid solution. How many liters of each solution should she mix if she wants to obtain 100 liters of a 40% acid solution?

Question 1134717: Rachel has 25% acid solution and a 50% acid solution. How many liters of each solution should she mix if she wants to obtain 100 liters of a 40% acid solution?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Rachel has 25% acid solution and a 50% acid solution. How many liters of each solution should she mix if she wants to obtain 100 liters of a 40% acid solution?
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t = 25%
f = 50%
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t + f = 100 ---- total solution
25t + 50f = 100*40 ------- total acid
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Solve them.

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