\[2x - 3 = 5x + 6\]
\[5x - 2x = - 3 - 6\]
\[3x = - 9\]
\[x = - 9\ :3\]
\[Корень\ уравнения:\ x = - 3.\]
\[1)\ 19 \cdot (2x - 3) = 19 \cdot (5x + 6)\]
\[2x - 3 = 5x + 6\]
\[5x - 2x = - 3 - 6\]
\[3x = - 9\]
\[x = - 3\]
\[\Longrightarrow подходит.\ \]
\[2)\ 5x - 2x = 6 - 3\]
\[3x = 3\]
\[x = 1\]
\[\Longrightarrow не\ подходит.\]
\[3)\ \frac{2x - 3}{11} = \frac{5x + 6}{11}\ \ \ \ \ \ | \cdot 11\]
\[2x - 3 = 5x + 6\]
\[5x - 2x = - 3 - 6\]
\[3x = - 9\]
\[x = - 3.\]
\[\Longrightarrow подходит.\]