Question 1074257
Salt in water can be made higher than about 24% ONLY AT MUCH HIGHER TEMPERATURES from ordinary room temperature.  


Here's the arithmetic anyway.



x, how much of the 11% salt solution

{{{(11x+30*10)/(x+10)=21}}}

{{{11x+300=21x+210}}}

{{{300-210=10x}}}

{{{90=10x}}}
{{{highlight(x=9)}}}