1. **State the problem:** We need to find the value of $x$ such that $f(x) = 4$ given the function $f(x) = 2x + 2$. 2. **Write the equation:** Set $f(x)$ equal to 4: $$2x + 2 = 4$$ 3. **Solve for $x$:** Subtract 2 from both sides: $$2x = 4 - 2$$ $$2x = 2$$ Divide both sides by 2: $$x = \frac{2}{2} = 1$$ 4. **Conclusion:** The value of $x$ that makes $f(x) = 4$ is $x = 1$. This means when you input $x=1$ into the function $f(x) = 2x + 2$, the output is 4.