2. Solve the following system of equations using the Gauss and Gauss-Jordan elimination methods. 2x1 + x2 - X3 + 4x4 = 19 -X1 - 2x2 + x3 + 2x, = -3 2x, + 4x2 + 2x3 + x4 = 25 X1- 2x2 + 4x3 - 16

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