\[\left\{ \begin{matrix} \frac{x}{(x - 5)^{2}} > 0 \\ 6x - x^{2} > 0 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x > 0;\ \ x \neq 5 \\ x(x - 6) < 0 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} x > 0\text{\ \ \ \ \ \ \ \ } \\ x \neq 5\text{\ \ \ \ \ \ \ } \\ 0 < x < 6 \\ \end{matrix} \right.\ \]
\[x \in (0;5) \cup (5;6).\]