SOLUTION: Moonshine has 50 liters of a 70% alcohol solution. How many liters of pure alcohol must be added to obtain an 80% alcohol solution?

Question 547190: Moonshine has 50 liters of a 70% alcohol solution. How many liters of pure alcohol must be added to obtain an 80% alcohol solution?
Answer by mathie123(224) (Show Source): You can put this solution on YOUR website!
Let x be the number of litres of pure alcohol that is added.

(Note: each term consists of the number of litres times the percentage of alcohol)

Therefore, 25 litres of pure alcohol must be added.
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