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How many gallons of a 60% alcohol solution must be mixed with 90 gallons of 25% alcohol to get a mixture that is 50% alcohol?

 Sep 12, 2020
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Let the number of gallons of the 60% alcohol solution =G

 

0.60G + 0.25 * 90 = 0.50 * [G + 90], solve for G

 

G = 225 gallons of 60% alcohol solution will be needed.

 Sep 12, 2020

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