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Solve the system of equations using matrices. Use the Gaussian elimination method with back-substitution. x+ y - Z= -5 5x - y+ z= -7 -

Solve the system of equations using matrices. Use the Gaussian elimination method with back-substitution. x+ y - Z= -5 5x - y+ z= -7 - x + 4y - 32 = 1 The solution set is (Simplify your answers.)

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