\[\frac{x}{2} - \frac{y}{6} = 1\ \ \ | \cdot 6\]
\[3x - y = 6;\]
\[\frac{x}{4} + \frac{y}{3} = 3\ \ \ \ | \cdot 12\]
\[3x + 4y = 36.\]
\[\left\{ \begin{matrix} 3x - y = 6\ \ \ \ \ \\ 3x + 4y = 36 \\ \end{matrix} \right.\ ( - )\]
\[- 5y = - 30\]
\[y = 6.\]
\[3x = 6 + y = 6 + 6 = 12\]
\[x = 4.\]
\[Ответ:(4;6).\]