4 3 7 9 2 ) July 8, 2019 16 32 64 128 3 4 7 9 21 4 1 3 7 2 9 X 4 2 )+ 3 7 =- 2 9 6 2 3 4 7 9 4 7 8 9 2 3 4 9 2 3 class 7 4 3 2 1 − 9 7 x 9 4 (- a 9 )+ 3 7 2a X 7 2x 9 4 3 3 2x 9 )+ 4 7 x )- 12 4 3 5 7 2 9 Х 4 2 )+ 3 7 =- 2 9 4 3 x )+ 9 7 2 x )+ 29 4 7 x 9 12 3 7 2 4 2 3 7 9 as a fraction