Do the following pair of linear equations have no solution? Justify your answer.
$ 3 x+y-3=0 $
$ 2 x+\frac{2}{3} y=2 $
Given :
The given pair of equations is,
\( 3 x+y-3=0 \)
\( 2 x+\frac{2}{3} y=2 \)
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
$\frac{a_1}{a_2}=\frac{b_1}{b_2}≠\frac{c_1}{c_2}$
\( 3 x+y-3=0 \)
\( 3(2 x)+3(\frac{2}{3} y)=3(2) \)
$6x+2y-6=0$
Here,
$a_1=3, b_1=1, c_1=-3$
$a_2=6, b_2=2, c_2=-6$
Therefore,
$\frac{a_1}{a_2}=\frac{3}{6}=\frac{1}{2}$
$\frac{b_1}{b_2}=\frac{1}{2}$
$\frac{c_1}{c_2}=\frac{-3}{-6}=\frac{1}{2}$
Here,
$\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}$
Hence, the given pair of linear equations represent coincident lines.
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