\[(a + 2)x < 3\]
\[a = - 2 \Longrightarrow x \cdot 0 < 3 \Longrightarrow\]
\[\Longrightarrow ( - \infty; + \infty).\]
\[a < - 2 \Longrightarrow x > \frac{3}{a + 2}\]
\[a > - 2 \Longrightarrow x < \frac{3}{a + 2}\]