SOLUTION: For extremely cold temperatures, an automobile facturer recommends that a 80% antifreeze and 20% water mix be used in the cooling system of a car. How many quarts of pure 100% anti

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: For extremely cold temperatures, an automobile facturer recommends that a 80% antifreeze and 20% water mix be used in the cooling system of a car. How many quarts of pure 100% anti      Log On


   



Question 331576: For extremely cold temperatures, an automobile facturer recommends that a 80% antifreeze and 20% water mix be used in the cooling system of a car. How many quarts of pure 100% antifreeze and 50% antifreeze and 50% water mix should be combined to make 11 quarts of 80% antifreeze and 20% water mix?
Answer by galactus(183) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=amount of pure antifreeze to be added.
Since we want 11 quarts, then 11-x is the amount of 50% antifreeze.
x%2B.50%2811-x%29=.80%2811%29
x=6.6 quarts of pure and 4.4 quarts of 50/50