## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$$x=2,\:y=-\frac{1}{2},\:z=-1$$
Solving the equations using matrices, we find: $$\begin{bmatrix}6&2&-4&¦&15\\ -3&-4&2&¦&-6\\ 4&-6&3&¦&8\end{bmatrix} \\ \begin{bmatrix}1&0&0&¦&2\\ 0&1&0&¦&-\frac{1}{2}\\ 0&0&1&¦&-1\end{bmatrix}\\ x=2,\:y=-\frac{1}{2},\:z=-1$$