3 x 81 1 July 8, 2019 16 32 64 128 3 x 81 1 2 12 + x 3 = 81 3 х 1 81 2 3 x 81 16 3 x 8 1 81 3 5x 81 x 1 3 4 x 1 81 3 3x 7 1 81 33 9 x 3 81 12 7 3 5x 2 81 x 1 1 3 x 81 x 11 13 3 x 81 1 3 x 9 1 3 x 81 x 6 3 3x 1 81 1 3 x 81 x = 5