tolong ya cari Himpunan peyelesaiannya besok dikumpul

x-y+z = 6
x+3y+2z = 5
(-)
-4y-z = 1


x-y+z = 6 (x2) 2x-2y+2z = 12
2x+y-z = 0(x1) 2x+y-z = 0 (-)
= -3y+3z = 12


-4y-z = 1 (x3) -12-3z=3
-3y+3z = 12(x1) -3y+3z=12 (+)
= -15y = 15
= y = -1


-3y+z=12
-3(-1)+z=12
z=9


x-y+z=6
x-(-1)+9=6
x+1+9=6
x= -4