) Solve the following system of linear equations by first forming its augmented matrix and then row reducing it to reduced row echelon form. Express the solution in vector form. Show all of your steps and indicate the row operation performed at each step. 3x1 + 6x2 + 4x1 +8x2 + 9x3 12x3 -3x1 - 6x2 9x3 - + 4x4 -2x1 4x 6x3 + A - 325 0 425 0 5x5 = 12 3

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