1. Let's clarify the step where division was performed. 2. When dividing an expression, the sign of the first number can be negative; division rules apply as usual. 3. For example, if you have $$-6 \div 2$$, the result is $$-3$$ because dividing a negative by a positive yields a negative. 4. If the step involved simplifying a fraction like $$\frac{-6}{2}$$, it can be shown as $$\frac{\cancel{-6}}{\cancel{2}} = -3$$. 5. So, the first number being negative does not prevent division; it just affects the sign of the result. 6. If you provide the exact expression from the third step, I can explain the division in detail.