Question:
$5 x+7 y=-2$
$4 x+6 y=-3$
Solution:
Given: $5 x+7 y=-2$
$4 x+6 y=-3$
Using Cramer's Rule, we get
$D=\mid 5 \quad 7$
$4 \quad 6 \mid=30-28=2$
$D_{1}=\mid \begin{array}{ll}-2 & 7\end{array}$
$-3 \quad 6 \mid=-12+21=9$
$D_{2}=\mid 5-2$
$4-3 \mid=-15+8=-7$
Now,
$x=\frac{D_{1}}{D}=\frac{9}{2}$
$y=\frac{D_{2}}{D}=\frac{-7}{2}$
$\therefore x=\frac{9}{2}$ and $y=\frac{-7}{2}$