Answer
$(x,y)=(2,-3)$; dependent equation
Work Step by Step
Need to apply Cramer's Rule.
$x=\dfrac{D_x}{D}$; $y=\dfrac{D_y}{D}$
Now, $D=\begin{vmatrix}12&3\\2&-3\end{vmatrix}=-36-6=-42$;
$D_x=\begin{vmatrix}15&3\\131&-3\end{vmatrix}=-45-39=-84$
$D_y=\begin{vmatrix}12&13\\15&13\end{vmatrix}=156-30=126$
Thus, $x=\dfrac{-84}{-42}=2$ and $y=\dfrac{126}{-42}=-3$
Hence, $(x,y)=(2,-3)$; dependent equation
