\[2 - 5x = 23 - 3 \cdot (x + 4)\]
\[2 - 5x = 23 - 3x - 12\]
\[- 5x + 3x = 11 - 2\]
\[- 2x = 9\]
\[x = - 4,5.\]
\[Ответ:\ - 4,5.\]