Given:
The equation is:

One solution of this equation is -2.
To find:
The another solution of the given equation.
Solution:
We have,

It can be written as:


Divide both sides by -2.

After removing the modulus, we get

Case I:



Divide both sides by 0.5.

Case II:



Divide both sides by 0.5.

One solution of the given equation is
and the another one is
.
Therefore, the correct option is B.