1. The problem is to verify the equation $5 + 5 = 10$. 2. The formula used here is simple addition: $a + b = c$ where $a$, $b$, and $c$ are numbers. 3. Adding the numbers on the left side: $5 + 5 = 10$. 4. Since the sum on the left side equals the number on the right side, the equation is true. Therefore, $5 + 5 = 10$ is correct.