\[\frac{3x - 7}{x - 1} - \frac{x + 1}{x - 1} = 0\ \ \ \ \ \ \ \ | \cdot (x - 1);x \neq 1\]
\[3x - 7 - x - 1 = 0\]
\[2x - 8 = 0\]
\[2x = 8\]
\[x = 4.\]
\[Ответ:4.\]