SOLUTION: to make a weak solution of 24 liters of 4% acid,a lab technician will use some premixed solutions: one is 2% acid and the other is 5% acid. How many liters of each should he use to

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: to make a weak solution of 24 liters of 4% acid,a lab technician will use some premixed solutions: one is 2% acid and the other is 5% acid. How many liters of each should he use to      Log On


   

Question 550981: to make a weak solution of 24 liters of 4% acid,a lab technician will use some premixed solutions: one is 2% acid and the other is 5% acid. How many liters of each should he use to obtain the desired solution?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
percent percentage ---------------- quantity
Acid type I 2 ---------------- x ml
Acid type II 5 ---------------- 24 - x ml
Mixture 4.00% ---------------- 24

2x+5(24-x)=4*24
2x+120-5x=96
2x-5x=96-120
-3x=-24
/-3
x=8ml 2.00% Acid type I
16 ml 5.00% Acid type II