Ответ:
13 2/3 - 11,2 : 9 1/3 = 13 2/3 - 11 1/5 : 9 1/3 = 13 2/3 - 11 3/15 : 9 5/15 = 13 2/3 - 168/15 : 140/15 = 13 2/3 -
168 • 15
------------
15 • 140
= 13 2/3 - 6/5 = 13 10/15 - 18/15 = 12 25/15 - 18/15 = 12 7/15
840/70-630/70=840-630/70=210/70=3
sinx=π>1
нет решения