5 6x 1 3 1 6 July 8, 2019 16 32 64 128 5 6x 3 4x 1 2 3x 1 6 1 6x 2 3 1 2x 5 6 2 3 1 6x 5 6x 1 3 6 5 6x 1 1 3 )= 21 5 6x 1 )/ 3 1 x 3 )/ 6 11 12 1 6x 5 6x 1 3 5 6x-1=-1+6x