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