\[3a + 2b > 16;\ \ \ \ a > 4\ \ и\ \ \ b > 8\]
\[+ \left| \begin{matrix} 3a > 12 \\ 2b > 16 \\ \end{matrix} \right.\ \]
\[\text{\ \ }\overline{\ 3a + 2b > 28\ }\]