1. **State the problem:** Simplify the expression $x + x + 2$. 2. **Formula and rules:** When adding like terms, add their coefficients. Here, $x$ and $x$ are like terms. 3. **Intermediate work:** $x + x = 2x$, so the expression becomes $2x + 2$. 4. **Final answer:** The simplified expression is $2x + 2$.