1. Let's start by understanding what "Checkpoint math stage 9" typically covers. It usually includes topics like algebra, geometry, number operations, and basic problem-solving skills. 2. Since you feel like you might fail, let's focus on a common algebra problem to build confidence. For example, solving a linear equation like $2x + 3 = 11$. 3. The formula or rule to solve such equations is to isolate the variable $x$ by performing inverse operations. 4. Step-by-step: - Subtract 3 from both sides: $2x + 3 - 3 = 11 - 3$ which simplifies to $2x = 8$. - Divide both sides by 2: $\frac{2x}{2} = \frac{8}{2}$ which simplifies to $x = 4$. 5. So, the solution to the equation $2x + 3 = 11$ is $x = 4$. 6. Remember, the key is to perform the same operation on both sides of the equation to keep it balanced. 7. Practice similar problems to build your confidence and understanding. You can do this!