\[\left\{ \begin{matrix} 6x - 7 \geq 4x - 3\ \ \\ 3x + 16 \geq 8x - 4 \\ \end{matrix}\text{\ \ } \right.\ \text{\ \ \ \ }\]
\[\left\{ \begin{matrix} 2x \geq 4\ \ \\ 5x \leq 20 \\ \end{matrix}\text{\ \ } \right.\ \text{\ \ }\]
\[\left\{ \begin{matrix} x \geq 2 \\ x \leq 4 \\ \end{matrix} \right.\ \]
\[Ответ:\lbrack 2;\ 4\rbrack.\]