Find the Augmented Matrix That Represents the System Of $\left\{ \begin{array} { l } 7 x - 9 y = 3 \\7 x - 4 = 7 y\end{array} \right.$

Find the augmented matrix that represents the system of $\left\{ \begin{array} { l } 7 x - 9 y = 3 \\7 x - 4 = 7 y\end{array} \right.$ .

A) $\left[ \begin{array} { l l : l } 7 & - 9 & 3 \\7 & - 4 & 7\end{array} \right]$
B) $\left[ \begin{array} { c c : c } 7 & 9 & 3 \\7 & - 4 & 7\end{array} \right]$
C) $\left[ \begin{array} { c c : c } 7 & - 9 & 3 \\7 & - 7 & - 4\end{array} \right]$
D) $\left[ \begin{array} { l l : l } 7 & - 9 & 3 \\7 & - 7 & 4\end{array} \right]$