1. Let's start by understanding the problem: you want an explanation using an example. 2. Suppose we want to solve the equation $2x + 3 = 7$. 3. The goal is to find the value of $x$ that makes the equation true. 4. First, subtract 3 from both sides to isolate the term with $x$: $$2x + 3 - 3 = 7 - 3$$ which simplifies to $$2x = 4$$. 5. Next, divide both sides by 2 to solve for $x$: $$\frac{2x}{2} = \frac{4}{2}$$ which gives $$x = 2$$. 6. So, the solution to the equation $2x + 3 = 7$ is $x = 2$. 7. This example shows how to isolate the variable step-by-step to solve a simple linear equation.