\[\left\{ \begin{matrix} 4x - 5y = - 83 \\ 2x + 5y = 29\ \ \ \\ \end{matrix} \right.\ ( + )\]
\[6x = - 54\]
\[x = - 9.\]
\[5y = 29 - 2x = 29 + 18 = 47\]
\[y = 9,4.\]
\[Ответ:( - 9;9,4).\]