SOLUTION: A dehydrated patient needs a 3.24% saline IV. Unfortunately, the hospital only has bags of 1% and 9%saline solution. How many liters of each of these solutions should be mixed toge

Question 529845: A dehydrated patient needs a 3.24% saline IV. Unfortunately, the hospital only has bags of 1% and 9%saline solution. How many liters of each of these solutions should be mixed together to yield 5 liters of the desired concentration?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of 1% solution needed
Let = liters of 9% solution needed
given:
(1) liters
(2)
---------------------------
(2)
(2)
(2)
(2)
Subtract (1) from (2)
(2)
(1)

and, since
(1)
(1)
(1)
3.6 liters of 1% solution are needed
1.4 liters of 9% solution are needed
check:
(2)
(2)
(2)
(2)
OK
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