SOLUTION: How many gallons of a 65% saline solution needs to be mixed with8 gallons of pure water to create a 25% saline solution?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many gallons of a 65% saline solution needs to be mixed with8 gallons of pure water to create a 25% saline solution?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 391541: How many gallons of a 65% saline solution needs to be mixed with8 gallons of pure water to create a 25% saline solution?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
In words:
(salt)/(salt + water) = 25%
Let a = gallons of 65% solution needed
Salt in 65% solution = .65a
There is no salt in the pure water
.65a%2F%28a+%2B+8%29+=+.25
.65a+=+.25%2A%28a+%2B+8%29
.65a+=+.25a+%2B+2
.4a+=+2
a+=+5
5 gallons of 65% solution are needed