Which property of algebra should first be applied to 6a - 146 + 3a - 6 + 216 - 18a in order to determine whether it is equivalent to —9a + 76 — 6? (1 point)

The property of algebra that should first be applied to 6a - 146 + 3a - 6 + 216 - 18a in order to determine whether it is equivalent to —9a + 76 — 6 is the commutative property of addition.