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Solve the following LP model using the dual simplex method. Use the format of the tabular...

Solve the following LP model using the dual simplex method. Use the format of the tabular form of the simplex without converting the problem into a maximization  problem.

                                                Minimize -2x1 – x2

                                                Subject to

                                                                x1+ x2+ x3 = 2

                                                                x1 + x4 = 1

                                                                x1, x2, x3, x4 ³ 0

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