Question 450359
{{{12/(1+5e^(-2x)) = 6}}}
{{{12 = 6 + 30e^(-2x)}}}
{{{30e^(-2x) = 6}}} 
{{{e^(-2x) = 6/30 = 0.2}}} 
-2x = ln(0.2)
x = -ln(0.2)/2
x =~ 0.804719