SOLUTION: What quantity of 65 percent acid solution must be mixed with a 20 percent solution to produce 540 mL of a 50 percent solution?

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Question 352382: What quantity of 65 percent acid solution must be mixed with a 20 percent solution to produce 540 mL of a 50 percent solution?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(x)(65%) + (540-x)(20%) = (540)(50%)