SOLUTION: how much water must be evaporated from 28 ounces of 2% salt solution to make a 7% salt solution

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: how much water must be evaporated from 28 ounces of 2% salt solution to make a 7% salt solution      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 755336: how much water must be evaporated from 28 ounces of 2% salt solution to make a 7% salt solution
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Let w = the ounces of water to evaporate
The amount of salt is the same but the amount of water will decrease.

%2828%2A2%29%2F%2828-w%29=7
Solve for w.