How much salt could an average person hold? (Ignore safety concerns)

Given equation: 0.3x=y
0.3x meaning mass of water
y mean mass of salt that could be dissolved in the given mass of water

Assuming the average human body has 60-75% of water, let us just use 75%

Solve.

If the person weighs 150 lbs, then 150*0.75 = about 112 lbs H2O

0.3*112 = y = ? = lbs salt.