SOLUTION: A chemist has 25 liters of a 10% solution. How many liters of pure acid must be added to produce a 35% solution?

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Question 380046: A chemist has 25 liters of a 10% solution. How many liters of pure acid must be added to produce a 35% solution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A be the amount of 100% pure acid.
100A%2B10%2825%29=35%28A%2B25%29
100A%2B250=35A%2B875
65A=625
A=625%2F65
highlight%28A=125%2F13%29 liters