SOLUTION: A radiator contains 8 liters of a 25% antifreeze solution. How much should be drained and replaced with pure antifreeze to produce a 66% antifreeze solution? (Round your answer to

Question 892529: A radiator contains 8 liters of a 25% antifreeze solution. How much should be drained and replaced with pure antifreeze to produce a 66% antifreeze solution? (Round your answer to two decimal places.)
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let x = the # of liters to be drained and replaced.
After drainage, there is 8 - x liters left, with 25% antifreeze. The amount x liters is 100% antifreeze. The resulting 8 liters of solution has 66% antifreeze.
Hence 0.25*(8 - x) +1.00x = 0.66*8
==> 2- 0.25x + x = 5.28
==> 0.75x = 3.28
==> x = 3.28/0.75
+==> x = 4.37 liters of pure antrifreeze
RELATED QUESTIONS
A radiator contains 6 liters of a 25% antifreeze solution. How much should be drained... (answered by checkley75)

A radiator contains 6 liters of a 25% antifreeze solution. How much should be drained and (answered by josgarithmetic)

a radiator contains 6 liters of a 33% antifreeze solution. how much water should be... (answered by richwmiller)

A radiator contains 8 liters of a 25% antifreeze solution. How much should be drained and (answered by josgarithmetic)

A radiator contains 6 quarts of a 25% antifreeze solution. How much antifreeze should be (answered by checkley75)

A radiator contains 6 quarts of a 25% antifreeze solution. How much anitfreeze should be... (answered by ankor@dixie-net.com)

A radiator contains 7 liters of a 25% antifreeze solution. How much should be drained and (answered by josgarithmetic)

A radiator holds 6 liters. how much of the 20% antifreeze solution should be drained &... (answered by richwmiller)

A 16-quart radiator contains a 50% solution of antifreeze. How much needs to be drained... (answered by Mathtut)