(24960:(300(200—6х):115))=8
300(200-6x):115 = 24960 : 8
300(200-6x):115=3120
300(200-6x)=3120*115
300(200-6x)=358800
200-6x=358800:300
200-6x=1196
6x=200-1196
6x=-996
x=-996:6
x = -166