3 9 14 x 2 17 21 x 1 9 July 8, 2019 16 32 64 128 3 9 14 х 2 17 21 x 1 9 2 9 14 x-1 17 21 x=1 1 9 3 14 x 9 3 9/14x-1 17/21x=1 1/9 3 9/14х - 2 17/21х = 1 1/9
