1. We are given the function $f(x) = 2x + 2$ and asked to find the value of $x$ when $f(x) = 4$. 2. The problem can be written as an equation: $$2x + 2 = 4$$ 3. To solve for $x$, subtract 2 from both sides: $$2x + 2 - 2 = 4 - 2$$ which simplifies to $$2x = 2$$ 4. Now divide both sides by 2 to isolate $x$: $$x = \frac{2}{2} = 1$$ 5. Therefore, the value of $x$ when $f(x) = 4$ is $1$.