SOLUTION: A chemist has 12 liters of 25% solution. How many liters of water must be added to obtain a 20% solution?

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Question 373695: A chemist has 12 liters of 25% solution. How many liters of water must be added to obtain a 20% solution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Water is a 0% solution.
Let A be the amount of water added.
0%28A%29%2B25%2812%29=20%28A%2B12%29
300=20A%2B240
20A=60
highlight%28A=3%29liters