SOLUTION: "The radiator in your car contains 4 gallons of antifreeze and water. The mixture is 45% antifreeze. How much of the mixture should be drained and replaced with pure antifreeze in

Question 1129217: "The radiator in your car contains 4 gallons of antifreeze and water. The mixture is 45% antifreeze. How much of the mixture should be drained and replaced with pure antifreeze in order to have a 60% antifreeze solution? Solve as a system of linear equations in two variables and round to the nearest tenth of a gallon."
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = gallons of pure antifreeze drained from radiator
Let = total gallons of mixture removed from radiator
------------------------
(1)
(2)
----------------------------------
(2)
(2)
(2)
(2)
4.4 gallons of mixture should be removed
-------------------
check:

error due to rounding off
OK

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