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The question is:

Jason has 20 gallons of a 12% alcohol solution. How many gallons, to the nearest tenth, must be replaced by a 36% alcohol solution to give 20% gallons of 15% alcohol solution.

I need and explanation on how to set it up and do it. I have a test today and I don’t understand it.

The question is: Jason has 20 gallons of a 12% alcohol solution. How many gallons-example-1
User Mdurant
by
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1 Answer

4 votes

Answer:

2.5 gallons of the 20% solution must be replaced by the 36% solution.

Explanation:


.12(20 - x) + .36x = 20(.15)


2.4 - .12x + .36x = 3


2.4 - .24x = 3


- .24x = - .6


.24x = .6


x = 2.5

User Jobo
by
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