Question

The following expression represents the value of which variable in the solution of the system of equations below?
|2 -1 1|
|1 2 6|
|3 -1 2|
/
|2 -1 -2 |
|1 2 3|
|3 -1 -1 |
2x-y+z =-2
x+2y +6z =3
3x-y +2z =-1

1) x
2)y
3)z
4)it represents none of the variables

Answer 1

z

Answer 2

thanks