12 8x 4 3 2 6 July 8, 2019 16 32 64 128 1 4 12 8x )= 2 3 6x 3 4 8x 6 2 12 x 3 4 8x 6 2 12 1 2x 12×8=6 4 4 (12 - 2 4x)/8 = (3 8x - 19)/4