18 5x =- 12 July 8, 2019 16 32 64 128 18 5x 12x 15 7 18 5x 12 11x 5x 18 12x 4 5x 18 12x 14 5x 18 =- 12x 17 7x 18 5x 12 3x 18 5x 12 2x 18 5x 12 5x 18 4x 12 5x 18 8x 12 5x 12 18 x 5x 18 12x 9