SOLUTION: A mixture of 10% acid and 90% water is added to a 5 liters of pure acid. The final mixture is 40% water. How many liters of water are in the final mixture

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Question 932813: A mixture of 10% acid and 90% water is added to a 5 liters of pure acid. The final mixture is 40% water. How many liters of water are in the final mixture
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The description means, the resulting mixture is 60% acid.

Let w stand for volume of the water. The water contains 0% acid. The added mixture is 10% acid.


100%2A5%2F%285%2Bw%29=40
Solve for w.