SOLUTION: how many liters of the 5% saline solution and 25% saline solution must be mixed together go get 10 liters of 18% saline solution?

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Question 454745: how many liters of the 5% saline solution and 25% saline solution must be mixed together go get 10 liters of 18% saline solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
f+t=10
.05f+.25t=.18*10
f=3.5 liters of 5%
t=6.5 liters of 25%