1. The problem is to solve the equations or expressions given in Class 9 NCERT Book Chapter 6 Exercise 6.1, which typically involves algebraic expressions and linear equations. 2. The main formula used in such problems is the linear equation form: $$ax + b = 0$$ where $a$ and $b$ are constants and $x$ is the variable. 3. Important rules: - To solve for $x$, isolate the variable on one side. - Perform inverse operations to simplify. 4. Example problem: Solve $$2x + 3 = 7$$ 5. Step 1: Subtract 3 from both sides: $$2x + 3 - 3 = 7 - 3$$ $$2x = 4$$ 6. Step 2: Divide both sides by 2: $$\frac{2x}{2} = \frac{4}{2}$$ $$x = 2$$ 7. This method applies to all linear equations in Exercise 6.1. 8. If you have a specific question from Exercise 6.1, please provide it for detailed steps.