9 4 2x 5 July 8, 2019 16 32 64 128 4 2x 9 5x 2x 9 4 5 x 20 4 2x 5 )=- 9 2 x 4 9 3 2x 1 )- 5x 9 x 4 )/ 5 2x 4 8 2x 9 )= 4 5 4x 9 16 51 2x 4 11 34 Xy 9 2x 5y 4 5x 4 4 2x 9 )+ 5 9 2x 3 )+ 4 x 5 9 2x 5 )- 2 3x 4 X 9 5 4 2x 52 9 2x 4 8x 5 6 x 9 )= 4 2x 5 9 3 2x 4 )= 51