SOLUTION: How many quarts of pure alcohol must be added to 10 quarts of 10% alcohol solution to obtain a mixture which is 25% alcohol?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: How many quarts of pure alcohol must be added to 10 quarts of 10% alcohol solution to obtain a mixture which is 25% alcohol?      Log On


   

Question 325610: How many quarts of pure alcohol must be added to 10 quarts of 10% alcohol solution to obtain a mixture which is 25% alcohol?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
100% alcohol = x quarts
10% acohol =10 quarts
Mixture25% = 10+x quarts
..
x+0.1*10=0.25(10+x)
x+1 = 2.5 +0.25x
x-0.25x= 2.5-1
0.75x=1.5
x= 2 quarts of 100% acohol
..