tentukan hasil x dari sistem persamaan linear berikut 2x - y = -8 2y + z = 8 3x + y + z = -3

eliminasi x

2x-y. =-8(×3) 6x-3y=-24
3x+y+z=-3(×2) 6x+2y+2z=-3
______________________-
-5y-2z=-19

2y+z=8. (×2) 4y+2z=16
-5y-2z=-19(×1). -5y-2z=-19
______________________+
-y= -3
y=3
2x-y=-8
2x-3=-8
2x=-5
x=-5/2

2y+z=8
2(3)+z=8
z=2