SOLUTION: In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 2% solution to get a 14% solution. How many liters of the 20% solution are needed?

Question 126568: In a chemistry class, 12 L of a 12% alcohol solution must be mixed with a 2% solution to get a 14% solution. How many liters of the 20% solution are needed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
(amount of alcohol needed) / (total amount of solution) = 20%
In the 12% solution I have
liters alcohol
Let be the amount of 20% solution needed

4 liters of the 20% solution are needed
check

OK
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