SOLUTION: can you walk me through solving twenty minus negitive x is greater than or equal to 16?

Yes, I can.

20 - (-x) >= 16.   (1)

Distract 20 from both sides.  You will get an equivalent inequality

-(-x) >= 16-20,  or, which is the same

-(-x) >= -4.       (2)

Next, -(-x) = x, for any x. As a result, from  (2)  you have

  x >= -4.

It is the final form.  It is your answer.

The set {x | x >= -4} is the solution of the original inequality (1).

You can represent it in other form:

the set [,) is the solution.