1 9x 7 1 2 July 8, 2019 16 32 64 128 1 9x 7 18x 11 27x 2 1 2 2 7 1 9x 2x 1 5 9x 1 1 7 2 5x 1 1 )/ 9 1 9x 0 3 7 x 2 1 0 2х 1 9x 1 2 5 7 1 9x 5x 1 7 6x 2x 1 1 3 9x 15x 7 3x 22 )= 1 3
