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2. Solve the following simultaneous equations by Gaussian-Jordan elimination. X1 + x2-x3 =-3 . . . . . (1) 6x1 + 2x2 + 2x3 =

2. Solve the following simultaneous equations by Gaussian-Jordan elimination. X1 + x2-x3 =-3 . . . . . (1) 6x1 + 2x2 + 2x3 = 2 . . . . . ( 2 ) -3x1 +4 x2 + x3 = 1 . . . .. . (3) (20 marks)

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