-3,4(x+9 3/11)=-68
9 3/11-это девять целых три одиннадцатых

-3,4(x+9 3/11)=-68-3,4х-3,4*9 3/11=-68-3,4х-3 4/10*9 3/11=-68-3,4х-34/10*102/11=-68-3,4х-1734/55=-68-3,4х-31 29/55=-68-3,4х=-68+31 29/55-3,4х=-67 55/55+31 29/55-3,4х=-36 26/55х=-36 26/55:(-3,4)х=36 26/55:3 4/10х=2006/55:34/10х=2006/55*10/34х=118/11х=10 8/11Проверка:-3,4(10 8/11+9 3/11)=-68-3,4*19 11/11=-68-3,4*20=-68-68=-68