5/6(4,2x - 1 целая 1/5y) - 5,4(2/9 - 1,5y) =
5/6(4,2x-1 целая 1/5y)-5,4(2/9-1,5y)=3,5x-1y-1,2+8,1y=3,5x-1y+8,1y-1,2=3,5x+7,1y-1,2.