Question 1054552
{{{4^x + 2^(1+2x) = 40}}}
{{{(2^2)^x + 2^(1+2x) = 40}}}
{{{2^(2x)+2^1*2^(2x)=40}}}
{{{2^(2x)(1+2)=40}}}
{{{2^(2x)=40/3}}}
{{{2x=log(2,(40/3))}}}
{{{x=(1/2)log(2,(40/3))}}}
{{{x=(1/2)(log((40/3))/log((2)))}}}