## Precalculus (6th Edition)

$\left[\begin{array}{llll} -3 & 5 & | & 2\\ 6 & 2 & | & 7 \end{array}\right]$
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: $\left[\begin{array}{llll} -3 & 5 & | & 2\\ 6 & 2 & | & 7 \end{array}\right]$