\[\left\{ \begin{matrix} t - 5 > 0\ \ \ \\ 2t - 6 > 0 \\ \end{matrix} \right.\ \]
\[\ \left\{ \begin{matrix} t > 5\ \ \ \\ 2t < 6 \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} t > 5 \\ t < 3 \\ \end{matrix} \right.\ \]
\[нет\ решений.\]