Answer with Step-by-step explanation:
The Reflexive property states that for every real number x, x=x
Division property states that if a=b and we divide it by any non zero number c then also a/c=b/c
Multiplication property states that if a=b and we multiply it by any number c then also ac=bc
Addition property states that if a=b and we add it by any number c then also a+c=b+c
We are given that x= -6
Adding both sides by 6
⇒ x+6=0
Hence, it justifies the addition property.
Hence, correct option is:
D, Addition