Question 748399
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*y/(y+8)=35}}}
{{{75y=35(y+8)}}}
{{{75y=35y+35*8}}}
{{{40y=35*8}}}
{{{y=(35*8)/(8*5)}}}
{{{y=7}}} liters of ....