3 1 2 х 12 7 9 х 2 7 July 8, 2019 16 32 64 128 (12 7+х)-9 8=3 2 2 3/7 х/7 3 1/7 2 1/7 х 3 1/9 2 - 3 1/7 х 2 - 1 9 11
