Question

What is r-1-2r less than or equal to -2? I need to show my work also.

Answer 1

(r -1 -2r) <= -2. Simplify.

r -2r <= -2 +1.

-r <= -1. Divide both sides by -1 and reverse the sign. Recall in inequality
when you multiply or divide by negative, the inequality sign is
reversed.
r >= -1/-1

r >= 1.

That's it.