Write an augmented matrix and use elementary row operations in order to solve the following system of equations. Your final matrix should be in reduced row echelon form. 7x+2y=-7 -5x-y=-1 I don't understand how to do this at all

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A: Write the augmented matrix for the following system of equations.u+v+2w=12v−5w=23u+5v+w=1

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Q: Write the system of equations as an augmented matrix -4b 3d - 115 - 4s 7d -69 - - -5b + 8 7d 88

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