The linear system 3x3 = -6 3x3 0 x2 6x1 + 7x2 + 3x3 = 12 - = is not in echelon form. Begin by choosing which of the following statements are correct. If there is more than one reason w the system is not in echelon form, type the letters as a comma separated list. A. The system is not in echelon form because a variable is the leading variable of two or more equations.

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