1. **State the problem:** Solve for $x$ in the equation $x + 2 = 4$. 2. **Formula and rules:** To isolate $x$, subtract 2 from both sides of the equation. This uses the property of equality which states that if you do the same operation on both sides, the equality holds. 3. **Intermediate work:** $$x + 2 = 4$$ Subtract 2 from both sides: $$x + 2 - 2 = 4 - 2$$ Simplify: $$x = 2$$ 4. **Explanation:** We found the value of $x$ by undoing the addition of 2, which means subtracting 2 from both sides. This leaves $x$ alone on one side, giving the solution. **Final answer:** $x = 2$