7/18 - м = 1/12,
м = 7/18 - 1/12,
м = 14/36 - 3/36,
м = 11/36,
9 5/6 * (м - 1 1/4) = 3 3/7,
м - 1 1/4 = 3 3/7 : 9 5/6,
м - 1 1/4 = 24/7 : 59/6,
м - 1 1/4 = 24/7 * 6/59,
м - 1 1/4 = 144/413,
м = 144/413 + 1 1/4,
м = 144/413 + 5/4,
м = 576/1652 + 2065/1652,
м = 2641/1652,
м = 1 989/1652
