correct solution of -2x - 3 ≥ 21?

Question

Which of the following is the correct solution of -2x - 3 ≥ 21?

	x ≥ -12
	x ≤ 12
	x ≤ -12
	x ≥ 12

Answer 1

-2x - 3 ≥ 21

Add 3 to both sides to get -2x ≥ 24

Divide both sides by 2 to get -x ≥ 12

Multiply both sides by -1, which flips the inequality, to get x ≤ -12