15 7x 12 July 8, 2019 16 32 64 128 7x 15 12x 5 7x 15 12x 4x 15 7x 12 7x 15 127 15 12 (- 7x 6 7x 15 12x 8 7x 15 12x 210 7x 15 120 10x 15 7x 12 3x 15 7x 12 2 7x 15 12 35 7x 15 12x 34 7x 15 12x 2 7x 15 )= 128 4x 6 7x 15 120
