I need to solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give the soloution in terms of a parameter.
-3x+y-z=-4
6x-2y+2z=8
-12x+4y-4z=-16
-3x+y-z=-4
6x-2y+2z=8
-12x+4y-4z=-16