1. Let's start by understanding the problem you want to solve. Since you asked for a simple and easy explanation, I'll explain a basic algebra problem: solving for $x$ in the equation $2x + 3 = 7$. 2. The goal is to find the value of $x$ that makes the equation true. 3. The formula or rule we use here is to isolate $x$ by performing inverse operations. This means we do the opposite of what is currently done to $x$. 4. First, subtract 3 from both sides to get rid of the +3: $$2x + 3 - 3 = 7 - 3$$ which simplifies to $$2x = 4$$ 5. Next, divide both sides by 2 to solve for $x$: $$\frac{2x}{2} = \frac{4}{2}$$ which simplifies to $$x = 2$$ 6. So, the solution is $x = 2$. This means if you replace $x$ with 2 in the original equation, both sides will be equal. 7. To check, substitute $x=2$ back into the original equation: $$2(2) + 3 = 4 + 3 = 7$$ which is true. This is a simple way to solve linear equations by isolating the variable step-by-step.