SOLUTION: How much water should you add to 230 mL of a 20% salt solution to make the solution 15% salt?

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Question 356700: How much water should you add to 230 mL of a 20% salt solution to make the solution 15% salt?
Found 2 solutions by Fombitz, mananth:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Pure water is a 0% solution.
Let A be the amount of water added.
0%28A%29%2B20%28230%29=15%28A%2B230%29
20%28230%29=15A%2B15%28230%29
15A=5%28230%29
highlight%28A=230%2F3%29ml

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let water added be x ml 0% salt
230 ml 20%
Mixture = x+230 ml 15%
...
0+230*0.2=0.15(x+230)
46=0.15x+34.5
11.5=0.15x
x= 11.5/0.15
76.66 ml of water
...
m.ananth@hotmail.ca