Question 954799
{{{27^(x-1) = 3^(x+1)}}
{{{(3^3)^(x-1)=3^(x+1)}}}
{{{3^(3(x-1))=3^(x+1)}}}
So then,
{{{3(x-1)=x+1}}}
{{{3x-3=x+1}}}
{{{2x=4}}}
{{{x=2}}}