SOLUTION: How many gallons of a 70% antifreeze solution must be mixed with 60 gallons of a 15% antifreeze solution to make a 60% antifreeze solution?
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Question 501681: How many gallons of a 70% antifreeze solution must be mixed with 60 gallons of a 15% antifreeze solution to make a 60% antifreeze solution? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! --------percent ---------------- quantity
Antifreeze I 15 ---------------- 60 gal
Antifreeze II 70 ---------------- x gal
Mixture 60 ---------------- 60 + x gal
15*60+70x=60( 60 + x )
900 + 70 x = 3600 + 60 x
70 x + -60 x = 3600 - -900
10 x = 2700
/ 10
x = 270
270 gal of 70 % Antifreeze II
