Solve by Cramers rule. Check by Gauss elimination and back substitution. Show details. -4w + x +

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Solve by Cramer’s rule. Check by Gauss elimination and back substitution. Show details.

-4w +  x + y       = -10
   w - 4x       +  z =    1
   w       - 4y +  z =  -7
     x    +   y  - 4z = 10

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