5 3 2x 1 9 July 8, 2019 16 32 64 128 3 x 5 )- 7 2x 1 )=- 9x 20 2x 3 x 1 9x 5 4x 3x 1 6 x 3 5 2x 9 2x 4 x 3 )= 5 x 1 )- 9 (- x 7 )+ 5 3 1 2x 9 3 2x 5 1 9x 1 5 3 2x 2 9 4 3 1 2x 9 )- 5 55 3 4x 5 1 2x 9 3 2x 5 )= 6 x 1 )- 9 2 3 1 2x 5 9x 5 6x 21 =- 1 3 2x 9 4x 5 2 2x 3 )( x 1 )= 9 3 2 2x 1 )+ 5 4x 9 4x 5 11x 3 2x 2 9x 1