## Intermediate Algebra for College Students (7th Edition)

We will have to re-arrange the given equations as: $x+2y=3$ and $4x+8y=12$ Need to apply Cramer's Rule. $x=\dfrac{D_x}{D}$; $y=\dfrac{D_y}{D}$ Now, $D=\begin{vmatrix}1&2\\4&8\end{vmatrix}=8-8=0$; $D_x=\begin{vmatrix}3&2\\12&8\end{vmatrix}=0$; $D_y=\begin{vmatrix}1&3\\4&12\end{vmatrix}=0$ Hence, we get same lines all are having the common point.