Question:
Solve the following systems of equations:
$\frac{7 x-2 y}{x y}=5$
$\frac{8 x+7 y}{x y}=15$
Solution:
The given equations are:
$\frac{7 x-2 y}{x y}=5$
$7 x-2 y=5 x y$....(i)
$\frac{8 x+7 y}{x y}=15$
$8 x+7 y=15 x y$$\ldots($ ii $)$
Multiply equation $(i)$ by 7 and equation $(i i)$ by 2 , add both equations we get
Put the value of $y$ in equation $(i)$, we get
$7 x-2 \times 1=5 x \times 1$
$\Rightarrow 2 x=2$
$\Rightarrow x=1$
Hence the value of $x=1$ and $y=1$