8x + 4y -12z = -11
6x +2y -3z = -4
2x -8y - 6z = -12
6x +2y -3z = -4
2x -8y - 6z = -12
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They are variables, which you are no doubt supposed to solve for using techniques which you were taught in class.
Did you spend any time trying? How far did you get?
Did you spend any time trying? How far did you get?