SOLUTION: how many liters of a 15 percent salt solution must be added to 2 liters of 30 percent to make a mixture of 18 percent salt solution?
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Question 232904: how many liters of a 15 percent salt solution must be added to 2 liters of 30 percent to make a mixture of 18 percent salt solution?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
.30*2+.15x=.18(2+x)
.60+.15x=.36+.18x
.15x-.18x=.36-.60
-.03x=.24
x=-.24/-.03
x=8 liters of 15% salt solution is used.
Proof:
.30*2+.15*8=.18(2+8)
.60+1.2=.18*10
1.8=1.8
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