Substituting 1 for x in the equation 5x + 3=x⋅5 + 3 is a test case for which property?

Substituting 1 for x in the equation is a test case for the reflexive property. The reflexive property states that any value is equal to itself.

Substituting 1 for x in the equation 5x + 3 = x⋅5 + 3 is a test case for the Commutative Property of Addition.