9 x 1 2 7 3x July 8, 2019 16 32 64 128 X 1 2 3x 5x 7 x 9 2x 7 (- 3 x 2 1 9 )( 3x 5 18 9 x 2 )-( 3x 1 )= 7 7x 9 x 8 = 9 x 7 1/2 3 x 3 = 9 9 x 7 / 2
