6x 5 2x 7 9 July 8, 2019 16 32 64 128 3x 5 7 2x )= 6x 9 4x 9 5 2x 7 )- 6x 6x 5 2x 7 9x 5 6 9x-5 7x-2 2/3x=-44/45
