Answer:
Step-by-step explanation:
x + y + z = 6
2x - y + z = 3
3x + 2z = 9
3x - z = 0
-3x + z = 0
3z = 9
z = 3
x + y + 3 = 6
2x - y + 3 = 3
x + y = 3
2x -y = 0
3x = 3
x = 1
1 + y + 3 = 6
y + 4 = 6
y = 2
x = 1, y = 2, z = 3
