SOLUTION: How much water must be added to 4 liters of a solution of water and tamic acid that is 7 percent acid to obtain a solution that is 5 percent acid

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How much water must be added to 4 liters of a solution of water and tamic acid that is 7 percent acid to obtain a solution that is 5 percent acid       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 815056: How much water must be added to 4 liters of
a solution of water and tamic acid that is 7
percent acid to obtain a solution that is 5
percent acid
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Tamic? At least you did not say "tannic".
I would only question what kind of concentration you mean, whether w/w or w/v or v/v. 7% solution is significant enough strength that density maybe be very important for the calculation. If the percents are v/v, then you simply can use

4%2A7%2F%284%2Bx%29=5 where x is liters of water to add.