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Solve the following system of equations using Gaussian or​ Gauss-Jordan elimination. w + x + y...

Solve the following system of equations using Gaussian or​ Gauss-Jordan elimination.

w + x + y + z = -2

2w +2x - 2y - 2z = -12

3w - 2x + 2y + z = 4

w - x + 7y + 3z = 4

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