Which expression is equivalent to 12x − 8x + 3 and why? 3 + 4x, because (12x − 8x) + 3 = 4x + 3 = 3 + 4x 7x, because 12x − 8x + 3 = 4x + 3 = 7x 12x − 5, because 12x − (8x − 3) = 12x − 5 x, because 12x − 8x + 3 = 12x − 11x = x