Question:
Solve the following systems of equations:
$x+2 y=\frac{3}{2}$
$2 x+y=\frac{3}{2}$
Solution:
The given equations are:
$x+2 y=\frac{3}{2}$ $\ldots(i)$
$2 x+y=\frac{3}{2} \ldots(i i)$
Multiply equation (ii) by 2 and subtract equation (ii) from (i) we get
$x+2 y=\frac{3}{2}$
Put the value of $x$ in equation $(i)$, we get
$\frac{1}{2}+2 y=\frac{3}{2}$
$\Rightarrow 2 y=1$
$\Rightarrow y=\frac{1}{2}$
Hence the value of $x=\frac{1}{2}$ and $y=\frac{1}{2}$