12 1 2x 8 July 8, 2019 16 32 64 128 1 2x 12 8x 6 6 2x 12 1 8x 12 1 2x 1 3 8 4 1 2x 8 12 1 2x 8 x 12 5 8x 12 1 2x 5 8x 12 1 2x 2 1 2x 12 )+( 1 8x 3 8x 12 4 1 2x 6 12 1 2 x 1 3 8 2x 2x 1 12 =- 6 8 8 x 1 12 2x 6