\[\frac{2y - 2}{y + 3} - \frac{18}{y^{2} - 9} = \frac{y - 6}{y - 3}\]
\[ОДЗ:\ \ y + 3 \neq 0;\ \ y \neq - 3\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ y - 3 \neq 0;\ \ y \neq 3\]
\[\frac{2y - 2}{y + 3} - \frac{y - 6}{y - 3} = \frac{18}{y² - 9}\]
\[\frac{(2y - 2)(y - 3) - (y - 6)(y + 3)}{y^{2} - 9} =\]
\[= \frac{18}{y^{2} - 9}\]
\[y² - 5y + 6 = 0\]
\[D = b^{2} - 4ac =\]
\[= 25 - 4 \cdot 1 \cdot 6 = 25 - 24 = 1\]
\[y_{1} = \frac{5 - 1}{2} = \frac{4}{2} = 2\]
\[y_{2} = \frac{5 + 1}{2} = \frac{6}{2} =\]
\[= 3\ (не\ подходит\ по\ ОДЗ)\]
\[Ответ:\ \ y = 2.\]