Solve:

-2 < x + 1 < 2    subtract  1 from everything

-3 < x <  1

-6 ≤ -3x - 15 ≤ 12       add 15 to  everything

9  ≤ -3x  ≤ 27         divide  everything  by -3 and  reverse the inequality signs

-3 ≥ x ≥ -9