SOLUTION: How many liters of a 75% saline solution must be mixed with 8 liters or pure water to make a 35% saline solution.

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Question 748399: How many liters of a 75% saline solution must be mixed with 8 liters or pure water to make a 35% saline solution.
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Not sodium chloride in water. It could not be more than about 25%. Not sodium chloride in some other solvent; it is more soluble in water than other solvents.

Ignoring that but just going into the arithmetic,
75%2Ay%2F%28y%2B8%29=35
75y=35%28y%2B8%29
75y=35y%2B35%2A8
40y=35%2A8
y=%2835%2A8%29%2F%288%2A5%29
y=7 liters of ....