\[\frac{x^{2} + 4}{x - 1} = \frac{5x}{x - 1};\ \ x \neq 1\]
\[x^{2} + 4 = 5x\]
\[x^{2} - 5x + 4 = 0\]
\[x_{1} + x_{2} = 5;\ \ x_{1} \cdot x_{2} = 4\]
\[x_{1} = 1;\ \ x_{2} = 4.\]
\[Ответ:x = 1;x = 4.\]