Question

-16 ≤ x + -7 ≤ 2

Answer 1

So you want to isolate x right?

Answer 2

Take it as if there are two inequalities:
-16 ≤ x + -7
and
x + -7 ≤ 2

and solve for x, then scramble them back together :)

Answer 3

Can you do it?

Answer 4

well simply add 7 to all the 3 sides..
see if it helps ?

Answer 5

^ That's a shortcut by dealing with two inequalities at the same time, works well too :)