SOLUTION: What quantity of a 55% acid solution must be mixed with a 30% acid solution to produce 800 mL of a 36.25% solution?

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Question 820380: What quantity of a 55% acid solution must be mixed with a 30% acid solution to produce 800 mL of a 36.25% solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a+b=800,
.55a+.30b=.3625*800
a=200., b=600.