## Introductory Algebra for College Students (7th Edition)

$$x \geq \frac{b + a}{-2}$$
We first add $a$ on both sides: $$-2x \leq b + a$$ Divide both sides by $-2$. Dividing by a negative number means you need to reverse the sign as well: $$x \geq \frac{b + a}{-2}$$