Решите систему уравнений: 7x-3y=15; 5x+6y=27.

\[\left\{ \begin{matrix} 7x - 3y = 15\ \ \ \ | \cdot 2 \\ 5x + 6y = 27\ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} 14x - 6y = 30 \\ 5x + 6y = 27 \\ \end{matrix} + \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} 19x = 57\ \ \ \ \ \ \\ y = \frac{27 - 5x}{6} \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ }\]

\[\left\{ \begin{matrix} x = 3 \\ y = 2 \\ \end{matrix} \right.\ \]

\[Ответ:(3;2).\]