## Algebra 1: Common Core (15th Edition)

$x=12$.
$3^{x}=27^{4}$ $3^{x}=(3^{3})^{4}$ (since $3^{3}=27$) $3^{x}=3^{12}$ (since $(a^{b})^{c}=a^{bc}$) $x=12$.