2 mũ x-1...............................................help

$\text{$2^{x-1}$ = 16}$

$\text{$2^{x-1}$ = $2^{4}$}$

`\text{x - 1} = 4`

`\text{x} = 4 + 1`

`\text{x} = 5`

`\text{Vậy x = 5`

$\textit{pminh}$