A. Identify the property of equality illustrated in each statement.
________ 1) a = a
________ 2) If x − 5 = 1, then x − 5 + 5 = 1 + 5
________ 3) If x + 3 = 2x + 9 and 2x + 9 = 6, then x + 3 = 6
________ 4) If 2x = −x + 7, then 2x + x = −x + 7 + x
________ 5) If 3x = −6, then 3x
3
=
−6
3