SOLUTION: A Cooling System In An Automobile Requires 2.5 Gallons Of A 50% Antifreeze Solution. Presently, The Sytem Has A 30% Solution. How Much Of The Present Solution Must Be Replaced With

Question 781560: A Cooling System In An Automobile Requires 2.5 Gallons Of A 50% Antifreeze Solution. Presently, The Sytem Has A 30% Solution. How Much Of The Present Solution Must Be Replaced With Pure Antifreeze To Bring The System Up To The Recommended Concentration?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Have 30% concentration; want 50% concentration, no change in volume.
v = volume gallons of the 30% to remove and replace with pure.

------You need to understand this equation.

Remove of a gallon and replace with pure 100% antifreeze.
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