9 2 4x 7 July 8, 2019 16 32 64 128 9 2 (- 4x 7 )= 11 6x 9 )+( 4x 2 7 9 2 3 4x )= 3x 7 7x 9 =- 2 4x 4x 2 7x 9 0 4x 2 9 =- 7x 4 2 4x 7 )= 7x 9 5 4x 2 7x 9 0 6x 2 4x 7 )-( x 9 3x 2y 9 4x 2 6y 7 4x 2 )-( 7x 3 )= 9 9 2 5 4x 7 2x 5 8 3x 9 )( 4x 2 7 )= 0 2 4x 9 7 5x 3x 10 2 9 x 3 )= 4x 7