
Kapo C. answered 02/02/19
Tutor
4.9
(18)
Groundwater Modeler with 20 years modeling experience
-11 ≤ -2x - 1 ≤ -5
add 1 to all terms which will yield:
-10 ≤ -2x ≤ -4
divide all terms by -2 which flips the inequality an yields:
5 ≥ x ≥ 2 the interval is then [2;5]