SOLUTION: How many gallons of 20% saline solution should be mixed with 12 gallons of pure water to make a 15% saline?
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Question 280927: How many gallons of 20% saline solution should be mixed with 12 gallons of pure water to make a 15% saline?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.20x=.15(12+x)
.20x=1.8+.15x
,20x-.15x=1.8
.05x=1.8
x=1/8/.05
x=36 gallons of saline solution is needed.
Proof:
.20*36=.15(12+36)
7.2=.15*48
7.2=7.2
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