HELP PLEASE ASAP IF NOT RIGHT ANSWER WILL BE REPORTED!!! I WILL MARK BRAINIEST IF ANSWER HELPS/IS CORRECT!

a 0 = x + -x

Step-by-step explanation:

variables can be added just like numbers. a number and it's opposite sum to zero.

therefore, x and it's opposite (-x) sum to zero

A

Step-by-step explanation:

This is because -x and positive x would cancel each other out, making 0

Hope this helps!

b

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!