SOLUTION: a car radiator hold 2 gallons of fluid and initially is empty. if a mixture of water and antifreeze contains 70% antifreeze and another mixture contains 15% antifreeze, how much of

Algebra ->  Expressions-with-variables -> SOLUTION: a car radiator hold 2 gallons of fluid and initially is empty. if a mixture of water and antifreeze contains 70% antifreeze and another mixture contains 15% antifreeze, how much of      Log On


   

Question 949253: a car radiator hold 2 gallons of fluid and initially is empty. if a mixture of water and antifreeze contains 70% antifreeze and another mixture contains 15% antifreeze, how much of each should be combined to fill the radiator with a 50% antifreeze mixture?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
You want to use this.

Mixture result, 2 gallons.
Mixture concentration wanted, 50%, or 0.50.
Antifreeze solutions to mix, 70% and 15%, or 0.7 and 0.15.

TRY to use just one variable.
Let v = how much of the 70% antifreeze to use.
This means, 2-v is how much of the 15% antifreeze to use.

highlight_green%28%28%282-v%2915%2B70v%29%2F2=50%29.

Simplify and solve.