4 3 (- 9x 12 )- x July 8, 2019 16 32 64 128 4 3 (- 9x 12 )- x 11x 9 4 3 (- 9x 12 )- x 13x 9 5 x 2 )- 4 3x 3 )=- 9x 12 4 9x 10 x 3 12 5x 4 2x 3 9x 12 )/( x 2 3x 4 13 x 4 )+ 9x 12 3 50 3 x 3 = 9 9/12 x 4 9 x 4 + 3