\[\frac{x^{2} + 5x}{x - 1} = \frac{6}{x - 1}\ \ \ \ | \cdot (x - 1);\ x \neq 1\]
\[\ x² + 5x = 6\]
\[x^{2} - 5x - 6 = 0\]
\[x_{1} + x_{2} = - 5;\ \ x_{1} \cdot x_{2} = - 6\]
\[x_{1} = - 6;\ \ \ \ \ \ \ \ \ \ \ x_{2} = 1\ (не\ подходит).\]
\[Ответ:\ x = - 6.\]