1. **State the problem:** If $x + 2 = 4$, find the value of $x$. 2. **Use the rule for solving one-step equations:** To isolate $x$, undo the $+2$ by subtracting $2$ from both sides. 3. **Subtract $2$ from both sides:** $$x + 2 - 2 = 4 - 2$$ 4. **Show the cancellation:** $$x + \cancel{2} - \cancel{2} = 4 - 2$$ 5. **Simplify both sides:** $$x = 2$$ 6. **Final answer:** $x = 2$