5 3 7 x 12 1 4 July 8, 2019 16 32 64 128 2x 3 7 12 x 4 1 5 4x 5 13 1 12 4 3x 5 3 x 7 4 (- 5 6 * x 7 12 (- 1 3 * x 1 4 5 x 7 = 35 5 12 + 7/12 x 1 3/7 5 12 + 7/12 х 1 3/7