3 2x 5 )- 2 x 7 July 8, 2019 16 32 64 128 7x 2x 3 5 x 2 21 3 7 2x )= 5 2 x 9 5 2 x )= 3 2x 7 3x 2 3 2x 4 5 x 7 3x 1 3 2x 1 )= 7 2 x 5 7x 2 5 x )= 3 2x 1 2 x 5 )+ 7 =- 3 2x 6 X 5 2 3 2x 2 x 4 5x 7 9x 5 x 7 2 3 2x 14 2x 1 5 x 2 3 x 7 15 4 2x 3 5 )-( 5 2 x (- 7 4 2 ) 73 3 2x 5 )- 2 x 5 2x 3 4x 5 )=- 2 8 x 7