SOLUTION: suppose you havea supply of a 30% solution of alcohol and a 70% solution of alcohol. How many quarts of each should be mixed to produce 20 quarts that is 40% alcohol?

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Question 882526: suppose you havea supply of a 30% solution of alcohol and a 70% solution of alcohol. How many quarts of each should be mixed to produce 20 quarts that is 40% alcohol?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
.70x + .30(20Q -x) = .40(20Q)
x = .10(20Q)/.40