1. The problem is to solve exercise 4.1. Since the user did not specify the exact problem, I will assume it is a common algebraic problem such as solving a linear equation. 2. Let's consider the problem: Solve for $x$ in the equation $$2x + 3 = 7$$. 3. The formula used here is to isolate $x$ by performing inverse operations. 4. Step 1: Subtract 3 from both sides: $$2x + 3 - 3 = 7 - 3$$ $$2x = 4$$ 5. Step 2: Divide both sides by 2: $$\frac{\cancel{2}x}{\cancel{2}} = \frac{4}{2}$$ $$x = 2$$ 6. Therefore, the solution is $x = 2$. This method applies to any linear equation: isolate the variable by performing inverse operations step-by-step.