Answer: If a matrix A is premultiplied by an elementary matrix E, the product EA will be

Chapter 8, Problem 41

(choose chapter or problem)

Write \(\left(\begin{array}{ll} a_{11} & a_{12} \\ a_{21} & a_{22} \end{array}\right)\left(\begin{array}{l} x_{1} \\ x_{2} \end{array}\right)=\left(\begin{array}{l} b_{1} \\ b_{2} \end{array}\right)\) without matrices.

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