SOLUTION: Joey has a 25% antifreeze solution. He also has pure antifreeze. How much of the 25% solution and the pure antifreeze is needed to fill his 12- quart cooling system with a 50% anti

Question 732067: Joey has a 25% antifreeze solution. He also has pure antifreeze. How much of the 25% solution and the pure antifreeze is needed to fill his 12- quart cooling system with a 50% antifreeze solution?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = quarts of 25% solution needed
Let = quarts of pure antifreeze needed
given:
(1)
(2)
-------------------------
(2)
(2)
(2)
(2)
Subtract (1) from (2)
(2)
(1)

and, since
(1)
(1)
8 quarts of 25% solution are needed
4 quarts of pure antifreeze are needed
check:
(2)
(2)
(2)
(2)
OK
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