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Use an LU-factorization of the coefficient matrix to solve the linear system. 14 %3D 2x1 -2x1 + X2 - X3 , + 22 +

Use an LU-factorization of the coefficient matrix to solve the linear system. 14 %3D 2x1 -2x1 + X2 - X3 , + 22 + = -14 45 %3D -X4 -1 X1 X2 X3 X4 II

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