\[x^{2} + y^{2} + 34 = 6x - 10y\]
\[x^{2} - 6x + 34 + y^{2} + 10y = 0\]
\[(x - 3)^{2} + (y + 5)^{2} = 0\]
\[x - 3 = 0\ \ \ \ \ \ \ \ \ \ y + 5 = 0\]
\[x = 3\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ y = - 5\]
\[Ответ:x = 3;\ \ y = - 5.\]