1. Let's start with a simple problem to teach you mathematics: Solve for $x$ in the equation $2x + 3 = 7$. 2. The formula we use here is to isolate $x$ by performing inverse operations. 3. First, subtract 3 from both sides: $$2x + 3 - 3 = 7 - 3$$ which simplifies to $$2x = 4$$ 4. Next, divide both sides by 2 to solve for $x$: $$\frac{\cancel{2}x}{\cancel{2}} = \frac{4}{2}$$ which simplifies to $$x = 2$$ 5. So, the solution to the equation $2x + 3 = 7$ is $x = 2$. This is a basic example of solving linear equations, which is a fundamental skill in algebra. You perform operations to both sides of the equation to keep it balanced and isolate the variable you want to find.