1. **State the problem:** Solve the inequality $u - 4 > 16$ and simplify the answer. 2. **Formula and rules:** To solve inequalities, we isolate the variable on one side by performing inverse operations. When adding or subtracting the same number on both sides, the inequality direction remains the same. 3. **Step-by-step solution:** Start with the inequality: $$u - 4 > 16$$ Add 4 to both sides to isolate $u$: $$u - 4 + 4 > 16 + 4$$ Simplify: $$u > 20$$ 4. **Final answer:** The solution to the inequality is: $$u > 20$$ This means $u$ can be any number greater than 20.