3 6x 1 ) 4x 12x 9 July 8, 2019 16 32 64 128 3 6x 1 )+ 4x 12x 9 1-12x 3x+1 2 - 6x 4+4x 12 / 4 x 6 12 6 x 3 4 3 - 4x 19 6x =12