Question

If $D_x=30,D_y=42$ and $D=6$ are the values of the determinants for certain simultaneous equations in $x$ and $y$, then find the values of $x$ and $y$.

Answer 1

Given $D_x=30,D_y=42$ and $D=6$
now $x=\frac{D_x}{D}=\frac{30}{6}=5y=\frac{D_y}{D}=\frac{42}{6}=7$
$\therefore$ The value of $x$ and $y$ is $5$ and $7$ respectively.