\[\frac{x + 4}{x + 4} = 1;\ \ \ \ x \neq - 4\]
\[x + 4 = x + 4\]
\[0 = 0 \Longrightarrow x - любое,\ \]
\[кроме\ x = - 4.\]
\[Ответ:x - любое,\ \]
\[кроме\ x = - 4.\ \]