algebra 1
posted by ledarrius .
name the property that justifies the following 15=15

Transitive

no, transitive says that if a=b and b=c, then a=c
I'd call this identity. a number is equal to itself.
although, usually one speaks of identity in conjunction with addition or multiplication.
also, since "=" is a relation, this could be called the reflexive property of the "=" relation.