SOLUTION: My car's radiator is full of an antifreeze-water mixture that is 75% water and 25% antifreeze. I left the cap off while driving and a lot of the mixture leaked out. I filled up the

Question 733592: My car's radiator is full of an antifreeze-water mixture that is 75% water and 25% antifreeze. I left the cap off while driving and a lot of the mixture leaked out. I filled up the radiator with 9 quarts of water as I was out of antifreeze and then foud the mixture was only 12% antifreeze. What is the capacity of the radiator.
I tried setting my problem up as .75(.25)=18.75 and .12(.88)=10.56 This answer got me nowhere and now I am stuck. Please help!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the radiator's capacity in quarts
After losing mixture, quarts of water filled the radiator,
so quarts of mixture was lost
-------------
You started with quarts of antifreeze and lost
quarts, so there is quarts
of antifreeze in the radiator before the water is added
-------------

The capacity of the radiator is 17.3077 quarts
check answer:
There is quarts of antifreeze to start
quarts of antifreeze were lost
quarts of antifreeze left
After water is added,

close enough
Hope I got it

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