7 (- 1 x )= 2 3x 4 )- 2x July 8, 2019 16 32 64 128 X 7 )( 3x 2 )-( 5x 1 )( 2x 4 2x 7 )( 3x 4 )+ 7 =( 6x 1 )( x 2 4 x 2 )- 7 2x 1 )+ 9 3x 4 )= 30 2 3x 7 )+ 3 x 1 )= 4 2x 3