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Do the following pair of linear equations have no solution? Justify your answer.
$ x=2 y $
$ y=2 x $
Given :
The given pair of equations is,
\( x=2 y \)
\( y=2 x \)
To find :
We have to find whether the given pair of equations has no solution.
Solution:
We know that,
The condition for no solution is
$\frac{a_1}{a_2}=\frac{b_1}{b_2}≠\frac{c_1}{c_2}$
\( x-2 y=0 \)
\( 2 x-y=0 \)
Here,
$a_1=1, b_1=-2, c_1=0$
$a_2=2, b_2=-1, c_2=0$
Therefore,
$\frac{a_1}{a_2}=\frac{1}{2}$
$\frac{b_1}{b_2}=\frac{-2}{-1}=2$
$\frac{c_1}{c_2}=\frac{-3}{-6}=\frac{1}{2}$
Here,
$\frac{a_1}{a_2}≠\frac{b_1}{b_2}$
Hence, the given pair of linear equations has a unique solution.
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