Question 970068
{{{ln(x)}}} and {{{e^(x)}}} are inverse functions.
{{{ln(e^x)=x}}}
{{{e^(ln(x))=x}}}
So,
{{{(1/3)(3x)-3x=12}}}
{{{x-3x=12}}}
{{{-2x=12}}}
{{{x=-6}}}
However {{{x=-6}}} is not allowed since {{{ln(-6)}}} is not defined.
There is no solution.