Absolute Value Inequalities
|9r + 5| ≥ 59
9r + 5 ≥ 59 → 9r ≥ 59 - 5 → 9r ≥ 54 → r ≥ 54/9 → r ≥ 6 [6,∞)
or
9r + 5 ≤ -59 → 9r ≤-59 - 5 → 9r ≤-64 → r ≤ -64/9 (-∞, -64/9]
return