Diketahui SPLTV berikut. 3/(x+1)-2/(y-3)+2/(z-1)=-1

Diketahui SPLTV berikut. 3/(x+1)-2/(y-3)+2/(z-1)=-1 4/(x+1)+4/(y-3)-6/(z-1)=-9 1/(x+1)+6/(y-3)+2/(z-1)=-3 Nilai x+y-z=. . . .