Which equation is an identity?
7 - (9x + 3) = -9x - 4
6m - 5 = 7m + 5 - m
10p + 6 - p = 12p - 3(p - 2)
3y + 2 = 3y - 2
7 - (9x + 3) = -9x - 4
6m - 5 = 7m + 5 - m
10p + 6 - p = 12p - 3(p - 2)
3y + 2 = 3y - 2
