- - - - - - - - - - - - - - - - - - -
28/9 * (33/28х - 3/10) = 1,5 - 35/6 + 5/6х 28/9*(-3/10)=-84/90=-28/30
33/9х - 28/30 = 1,5 - 35/6 + 5/6х
33/9х - 5/6х = 15/10 - 35/6 + 28/30
66/18х - 15/18х = 45/30 - 175/30 + 28/30
51/18х = - 102/30
х = - 102/30 : 51/18
х = - 102 /30 * 18/51 = - 918/30 = - 30,6
х = - 30,6