X+Y-Z=-1 4x-3y+2z=16 2x-2y-3z=5 can you help me on how to calculate a matrix. Every video I have watched doesn’t have a clear objective on what needs to be done.   What am I doing and what is the objective. Please show precise steps so I can follow.  The answer is x=2 y=-2 z=1   Thank you

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