1. The problem is to solve the equation $$-20 = -10x$$ for $x$. 2. The goal is to isolate $x$ by dividing both sides of the equation by the coefficient of $x$, which is $-10$. 3. Dividing both sides by $-10$: $$\frac{-20}{\cancel{-10}} = \frac{-10x}{\cancel{-10}}$$ 4. Simplifying the left side: $$2 = x$$ 5. Therefore, the solution is $x = 2$. 6. The correct last step is to divide both sides by $-10$ to get $x = 2$.