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Solve the system by back substitution 4x+8y+2z+6w= -2 -2y-12z-4w= -16 -z-w= -2 2w= 6

Solve the system by back substitution

4x+8y+2z+6w= -2

-2y-12z-4w= -16

-z-w= -2

2w= 6

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