Himpunan penyelesaian dari SPLTV 2x+y=9 2x+z=5 y+z=2

2x + y = 9
y + z = 2
___________-
2x - z = 7

2x - z = 7
2x + z = 5
___________-
-2z = 2
z = -1

y + z = y - 1 = 2
y = 3

2x + y= 2x + 3 =9
2x = 6
x = 3

x = 3, y = 3, z = -1