Question: Solve the system of equations using matrices. Use the Gaussian elimination method with back-substitution. 3x +3y +122 = 9 3x +2y + 82 = 4

Solve the system of equations using matrices. Use the Gaussian elimination method with back-substitution. 3x +3y +122 = 9 3x +2y + 82 = 4 2x +6y +30z = 20 The solution set is {(_ MEAD}. (Simplify your answers.)

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