\[\left\{ \begin{matrix} 7x + 3y = 43 \\ 4x - 3y = 67 \\ \end{matrix}( + ) \right.\ \]
\[\left\{ \begin{matrix} 11x = 110\ \ \ \\ y = \frac{43 - 7x}{3} \\ \end{matrix} \right.\ \Longrightarrow \left\{ \begin{matrix} x = 10\ \\ y = - 9 \\ \end{matrix} \right.\ \]
\[Ответ:(10;\ - 9)\text{.\ }\]