Question 147291: How many gallons of 50% antifreeze must be mixed with 80 gallons of 20% antifreeze to get a mixture that is 40% antifreeze? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = gallons of 50% antifreeze to be added
How much antifreeze is in it? gallons
How much antifreeze is in the 20% solution? gallons
What,s the total amount of solution you end up with?
In words:
(amount of antifreeze) / (total amount of solution) = % antifreeze
multiply both sides by
160 gallons of the 50% antifreeze must be added
check answer:
OK
