By using Gauss Elimination Method. Determine the values of Xi, X2, X3 and X4. XI + 3 X2 - 2X3 + X4 = -1 2X, - 2X2 + X3 - 2X4 XI + X2 - 3X3 + X4 + 2X3 - X4 = 3 1 = 6 3X %3D

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