Question

exponenciais : 27^x+1 = 9^x

Answer 1

$27^{x+1} = 9^{x}$
$(3^3)^{x+1} = (3^2)^{x}$
$3^{3x+3} = 3^{2x}$
$3x+3 = 2x$
$x=-3$