SOLUTION: How many quarts of water need to be added to 80 quarts of 80% alcohol to obtain a 70% alcohol solution

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many quarts of water need to be added to 80 quarts of 80% alcohol to obtain a 70% alcohol solution      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 340448: How many quarts of water need to be added to 80 quarts of 80% alcohol to obtain a 70% alcohol solution
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Water is a 0% alcohol solution.
Let A be the amount of water added.
0%28A%29%2B80%2880%29=70%28A%2B80%29
6400=70A%2B5600
70A=800
highlight%28A=80%2F7%29 quarts