Answer:
x = 1
y = 0
z = - 2
Step-by-step explanation:
{x + y + z = - 1 [tex]\rightarrow[/tex] x = - 1 - y - z
{x - y + z = - 1
{x + y - z = 3
x - y + z = - 1
- 1 - y - z - y + z = - 1
- 2y = 0
y = 0
x = - 1 - y - z
x = - 1 - z
x + y - z = 3
- 1 - z - z = 3
- 1 - 2z = 3
- 2z = 4
z = - 2
x = - 1 - z
x = - 1 - (- 2)
x = 1
Another way to answer this question below.
I hope I helped you.
