Question 719786
Your key to begin is {{{log(b,X)+log(b,Y)=log(b,XY)}}}, and {{{log(b,X)-log(b,Y)=log(b,X/Y)}}}.


{{{log(7,(x+4))-log(7,x)=2}}}
{{{log(7,((x+4)/(x)))=2}}}  
Translate into exponential form:
{{{highlight(7^2=(x+4)/x)}}}
{{{49x=x+4}}}
{{{48x=4}}}
{{{highlight(x=12)}}}