1. **Stating the problem:** We need to create an equation and solve it using grade 9 math concepts. 2. **Formulating the equation:** Let's consider a simple linear equation: $$2x + 3 = 11$$ 3. **Explaining the formula and rules:** This is a linear equation where $x$ is the unknown variable. Our goal is to isolate $x$ on one side to find its value. 4. **Solving step-by-step:** - Subtract 3 from both sides: $$2x + 3 - 3 = 11 - 3$$ $$2x = 8$$ - Divide both sides by 2: $$\frac{\cancel{2}x}{\cancel{2}} = \frac{8}{2}$$ $$x = 4$$ 5. **Answer:** The solution to the equation is $x = 4$. This means when $x$ is 4, the equation $2x + 3 = 11$ holds true.