1. Let's start with a simple algebra problem: Solve for $x$ in the equation $2x + 3 = 7$. 2. The formula to isolate $x$ is to get $x$ alone on one side of the equation. We do this 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 $x$: $$\frac{2x}{2} = \frac{4}{2}$$ which simplifies to $$x = 2$$ 5. So, the solution to the equation $2x + 3 = 7$ is $x = 2$. This means if you substitute $x=2$ back into the original equation, it holds true: $$2(2) + 3 = 4 + 3 = 7$$ which confirms our answer.