\[\boxed{\text{606\ (606).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[- 34y = - 68\]
\[y = 2\]
\[Ответ:y = 2.\]
\[17y = 17\]
\[y = 1\]
\[Ответ:y = 1.\]
\[y - 5 \neq 0,\ \ y \neq 5\]
\[y + 5 \neq 0,\ \ y \neq - 5\]
\[(y + 1)(y + 5) + 10 \cdot (y - 5) =\]
\[= 10 \cdot (y + 1)\]
\[y^{2} + 5y + y + 5 + 10y - 50 =\]
\[= 10y + 10\]
\[y^{2} + 6y - 55 = 0\]
\[D = 36 + 220 = 256 = 16^{2}\]
\[y_{1,2} = \frac{- 6 \pm 16}{2}\]
\[y_{1} = 5 - не\ подходит\ по\ \]
\[ОДЗ;\ y_{2} = - 11\]
\[Ответ:y = - 11.\]
\[y - 4 \neq 0,\ \ y \neq 4\]
\[y + 2 \neq 0,\ \ y \neq - 2\]
\[6 \cdot (y + 2) - y \cdot (y - 4) = 6y\]
\[6y + 12 - y^{2} + 4y = 6y\]
\[y^{2} - 4y - 12 = 0\]
\[D = 16 + 48 = 64\]
\[y_{1,2} = \frac{4 \pm 8}{2}\]
\[y_{1} = 6;\ \ y_{2} = - 2 -\]
\[не\ подходит\ по\ ОДЗ\]
\[Ответ:y = 6.\ \]