To solve the equation \( \frac{1}{x + 4} = 2 \), we will start by isolating \( x \).
First, take the reciprocal of both sides:
\[ x + 4 = \frac{1}{2} \]
Next, subtract \( 4 \) from both sides to solve for \( x \):
\[ x = \frac{1}{2} - 4 \]
Now, to compute \( 4 \) as a fraction with a denominator of \( 2 \), we rewrite it:
\[ 4 = \frac{8}{2} \]
Thus, we can subtract:
\[ x = \frac{1}{2} - \frac{8}{2} = \frac{1 - 8}{2} = \frac{-7}{2} \]
So the solution for \( x \) is:
\[ \boxed{-\frac{7}{2}} \]