Löse das lineare Gleichungssystem.


`{(-42x,+,7y,+,2z,+,42w,=,-321),(36x,-,3y,-,3z,-,36w,=,288),(-12x,+,2y,+,z,+,12w,=,-93),(126x,-,21y,-,6z,-,127w,=,967):}`

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y =  
z =  
w =