To simplify the expression $x - 2 - x + 4$, let's combine like terms.

1. Identify the like terms:

   • The terms with $x$ are $x$ and $-x$.
   • The constant terms are $-2$ and $+4$.

2. Combine the like terms: $(x - x) + (-2 + 4)$

3. Simplify the expression: $0 + 2 = 2$

Thus, the simplified form of the expression $x - 2 - x + 4$ is 2.

Would you like more details on this, or do you have any questions?

Here are 5 related questions to consider:

1. How do you simplify expressions with multiple variables?
2. What are the rules for combining like terms?
3. How do you factor expressions with both variables and constants?
4. How can you simplify an expression involving parentheses?
5. What are the steps to simplify expressions involving exponents?

Tip: Always group and combine like terms to simplify expressions efficiently.