\[\left\{ \begin{matrix} 5a - 3b = 14 \\ 2a + b = 10\ \ \ \\ \end{matrix} \right.\ \]
\[\left\{ \begin{matrix} b = 10 - 2a\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ 5a - 3(10 - 2a) = 14 \\ \end{matrix} \right.\ \]
\[5a - 30 + 6a = 14\]
\[11a = 44\]
\[a = 4.\]
\[b = 10 - 2a = 10 - 8 = 2.\]
\[Ответ:(4;2).\]