2 целые 15/2x-3*(5+11/18x)=19

2 15/2 х-3* (5+11/18 х) = 19 2 15/2 х - 15-33/18 х = 19 19/2 х -33/18 х = 19+15 171/18 х-33/18 х = 34 138/18 х = 34 х = 34:138/18 х = 34*18/138 х = 102/23 = 4 10/23  Проверяем: 19/2*102/23 - 3*(5+11/18*102/23) = 969/23 - 3*(5+561/207)= 969/23-3*1596/207 = = 969,23-4788/207 = 42,13-23,13 = 19  Ответ: 4 10/23.