7 6x 12 July 8, 2019 16 32 64 128 7 6x 12 )= 420 6x 7 12x 2 6x 7 12 7x 5x 7 6x 12 4x 7 6x 12 6x 7 x 12 6x 12y 7 6x 7 12 0 6x 7 12x 11 8x 7 6x 12 9x 7 6x 12 7 x 12 )-( 6x 15 1 6x 7 =- 12 5 6x 7 12 6x 7 3x 12