SOLUTION: Tank A contains 32 gallons of solution which is 25% alcohol by volume. Tank B has 50 gal of solution which is 40% alcohol by volume. What volume should be taken from each tank and

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Question 402595: Tank A contains 32 gallons of solution which is 25% alcohol by volume. Tank B has 50 gal of solution which is 40% alcohol by volume. What volume should be taken from each tank and combined in order to make up 40 gal of solution containing 30% alcohol by volume?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
0.25x + 0.40(40 - x) = 0.30*40
0.25x + 16 - 0.40x = 12
-0.15x = -4
x+=+26%262%2F3 gallons to be taken from tank A,
40+-+x+=+13%261%2F3 gallons to be taken from tank B.