Question: Solve this
1. **State the problem:** Simplify the expression $$7 - 2n + 3 + n$$ and then evaluate it at $$n = -2$$.
2. **Combine like terms:** Group the constants and the terms with $$n$$:
$$7 + 3 - 2n + n$$
3. **Simplify constants and variables:**
$$10 - n$$
4. **Substitute $$n = -2$$:**
$$10 - (-2) = 10 + 2 = 12$$
5. **Final answer:** The value of the expression when $$n = -2$$ is $$12$$.