Question 85087
I'm assuming your problem looks like this

{{{3^(x+5)=9^x}}}



{{{3^(x+5)=(3^2)^x}}} Rewrite 9 as {{{3^2}}}


{{{3^(x+5)=3^(2x)}}}


Since the bases are equal, this means this is true


{{{x+5=2x}}}


{{{5=x}}} Subtract x from both sides


So our answer is


{{{x=5}}}