Math
posted by Lena on .
Mathman couldn't resist the grooving tunes inside and paid his $5.00. He was heading straight for the punch bowl when he noticed a witch mixing it together using a solution which was 60% lizard drool and another that was only 25% lizard drool. If she wanted to make 30 liters of 39% lizard drool, how much of each does she need?
thanks so much!

Add up the amount of drool in each part.
.60x + .25(30x) = .39*30
.60x + 7.5  .25x = 11.7
.35x = 4.2
x = 12
12L 60%
18L 25%