An Augmented Matrix That Represents a System of Linear Equations $\left[ \begin{array} { c c c c } 1&0&0&\vdots& -3 \\0&1&0&\vdots& -9 \\0 & 0 & 1 &\vdots&3\\\end{array} \right]$

Multiple Choice

An augmented matrix that represents a system of linear equations (in variables x, y, z and w if applicable) has been reduced using Gauss-Jordan elimination.Find the solution represented by the augmented matrix. $\left[ \begin{array} { c c c c } 1&0&0&\vdots& -3 \\0&1&0&\vdots& -9 \\0 & 0 & 1 &\vdots&3\\\end{array} \right]$

A) (-3, 9, 3)
B) (3, -9, 3)
C) (-3, -9, 3)
D) (-3, -9, -3)
E) (-3, 3, -9)