1 9 3x 7 x 2 July 8, 2019 16 32 64 128 1 9 3x 7 )- 1 3 x 2 27 x 1 )= 9 3x 7 7 3x x 1 2x 9 3x 1 5x 9 2x 7 x 9 x 2 )-( 3x 1 )= 7 7x 1 3x 7 9 )( 6 5 3 2 x )= 0 3 x 3 = 9 1 3 9 27 pattern rule 3 1/9 x 2 1/7 3 1/7+x=9 1/2
