9x 4 12x 5 July 8, 2019 16 32 64 128 9x 4 12x 55 9x 4 12x 5 4x 6 9x 4 12x 55 180 9x 4 =- 3x 5 12x 9x 2 12x 4 5 9x 4 =- 3 5 12x 9x 5 12x 4 3x 3
