Question 313173
I'm assuming you mean log base 7:
{{{(1/2)(log(7,x)+log(7,8))=log(7,16)}}}
{{{log(7,x)+log(7,8)=2log(7,16)}}}
{{{log(7,x)+log(7,8)=log(7,16^2)}}}
{{{log(7,8x)=log(7,16^2)}}}
{{{8x=16^2}}}
{{{x=16^2/8}}}
{{{x=32}}}