\[\left\{ \begin{matrix} 3x - 5y = 8\ \ | \cdot 2 \\ 6x + 3y = 3\ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} 6x - 10y = 16 \\ 6x + 3y = 3\ \ \ \ \ \\ \end{matrix} \right.\ ( - )\]
\[- 13y = 13\]
\[y = - 1.\]
\[3x = 8 + 5y = 8 - 5 = 3\]
\[x = 1.\]
\[Ответ:(1; - 1).\]