7 4x 9 6x July 8, 2019 16 32 64 128 6x 7 =- 2 4x 9 4x 9 5 2x 7 )- 6x 7 4x 9 )=- 26 6x 7 4x 1 9 6x 7 9 4x 2 6x 12 6x 18 7 4x 9 4x 9 10 6x )- 7 7 6x 4 9 4x 6 7-4x 9