5 2x 1 ) 7 2 3x )=- 3 x 3 July 8, 2019 16 32 64 128 5 2x 1 )+ 7 2 3x )=- 3 x 3 3x 4 (- 2x 1 )= 3 x 5 )+ 2 2x 7 )- 3 3 x 2 2x 5 3 1 x 3x 7 6 5 x 7 = 35