4 (- x 12 )=- 2 4x 6 July 8, 2019 16 32 64 128 X 4 6x 3 9x 2 4x 12 4x 12 x 2 * 2x 4 2x 6 8 6 x 4 12 2 4x 10 4 + 4 = 12
