# Chapter 9 - Systems and Matrices - 9.2 Matrix Solution of Linear Systems - 9.2 Exercises - Page 871: 20

$\left\{\begin{array}{llll} 2x & & +z & =9\\ & -y & -z & =5\\ 3x & +y & & =8 \end{array}\right.$

#### Work Step by Step

The augmented matrix of the system consists of the elements of the coefficients matrix to the left, and the elements of the constants matrix to the right of (an optional) vertical line: The system associated with the augmented matrix is $\left\{\begin{array}{llll} 2x & & +z & =9\\ & -y & -z & =5\\ 3x & +y & & =8 \end{array}\right.$

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