1. **Problem statement:** Solve the equation: Seven more than a number is 18. 2. **Formula and rules:** Let the number be $x$. "Seven more than a number" means $x + 7$. The equation is: $$x + 7 = 18$$ 3. **Intermediate work:** Subtract 7 from both sides to isolate $x$: $$x + 7 - 7 = 18 - 7$$ $$x = 11$$ 4. **Explanation:** We set up the equation based on the phrase "seven more than a number". Then, we solved for $x$ by subtracting 7 from both sides. The solution is $x = 11$. **Final answer:** $$x = 11$$