SOLUTION: How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 898219: How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Adding the water changes the concentration but not the amount of acid.

Let w = amount of water to add.

8%2A40%2F%288%2Bw%29=10
Solve for w.

http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev