Additive inverse

Question

Mr. Lopez tells his class that they will need to use the additive inverse of a number to find the value of  in the equation below:

 

X+23= -5

 

Show how to find X using an additive inverse

Answer 1

X + 23 = -5

X + 23 + (-23) = -5 + (-23)

X + 0 = -28

X = -28