SOLUTION: How many gallons of 60% antifreeze solution must be mixed with 70 gallons of 15% antifreeze to get a mixture of 50% antifreeze.

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: How many gallons of 60% antifreeze solution must be mixed with 70 gallons of 15% antifreeze to get a mixture of 50% antifreeze.       Log On


   

Question 564656: How many gallons of 60% antifreeze solution must be mixed with 70 gallons of 15% antifreeze to get a mixture of 50% antifreeze.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
------------------------percent ---------------- quantity
Antifreeze type I 15----------------70 gallons
Antifreeze type II 60----------------x gallons
Mixture 50----------------70+x gallons

15*70+60x=50(70+x)
1050+60x=3500+50x
60x-50x=3500-1050
10x=2450
/ 10
x= 245 gallons of Antifreeze type II

m.ananth@hotmail.ca