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