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OR2 = -3 R2 O R2 = 3 R2 OR2 R2/3 Rescale by: Finally, perform the row operation: O R33 R1 + R2 R3 R3-9

OR2 = -3 R2 O R2 = 3 R2 OR2 R2/3 Rescale by: Finally, perform the row operation: O R33 R1 + R2 R3 R3-9 R2 O R3 R3 + 9 R2 O R32 R3 + 9 R1 1 0 -2 1 9 1-2 3 1 -11 -13 1 3 1 1 -4 The matrix is now in row-echelon form. Thus, back substituting, we find x3 x2 x1 =

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