-6<= x<=-3 — step-by-step solution

We have the following 2 conditions:

[1]:

-6 \leq x

[2]:

x \leq -3

Solution found [1]:

x \geq -6

Let's solve for x:

x \leq -3

[2] where

x \geq -6

Intersecting

x \geq -6

and

x \leq -3

gives

x \in [-6, -3]

▶Solution:

x \in [-6, -3]