SOLUTION: a 75% salt solution is to be mixed with a 50% salt solution to get 12 liters of a 60% salt solution. how many liters of the 75% solution is needed.

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Question 623507: a 75% salt solution is to be mixed with a 50% salt solution to get 12 liters of a 60% salt solution. how many liters of the 75% solution is needed.
Answer by lwsshak3(11628) About Me  (Show Source):
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a 75% salt solution is to be mixed with a 50% salt solution to get 12 liters of a 60% salt solution. how many liters of the 75% solution is needed.
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let x=liters of 75% solution to be mixed
12-x=liters of 50% solution to be mixed
..
75%x+50%(12-x)=60%*12
.75x+6-.5x=7.2
.25x=1.2
x=4.8
12-x=7.2
liters of 75% solution to be mixed=4.8
liters of 50% solution to be mixed=7.2