Если не трудно помогите

Решите задачу:

$...............................................\\\\(\frac{1}{2})^{x}\cdot (1+4)\ \textgreater \ 5\\\\(\frac{1}{2})^{x}\cdot 5\ \textgreater \ 5\\\\(\frac{1}{2})^{x}\ \textgreater \ 1\\\\(\frac{1}{2})^{x}\ \textgreater \ (\frac{1}{2})^0\\\\Tak\; kak\; \frac{1}{2}\ \textless \ 1 \; i\; y=(\frac{1}{2})^{x}-\; ybuvaushaya,\; to\; \; \underline {x\ \textless \ 0}\; .$