#### Answer

$$4x-5y-z=18 \\ -11x+6z=25 \\ 3x+8y=-29$$

#### Work Step by Step

In order to write a matrix that would solve a linear equation, we would write the coefficients of each variable in their own column. Thus, we reverse the process to find:
$$4x-5y-z=18 \\ -11x+6z=25 \\ 3x+8y=-29$$