By the graphical method, find whether the following pair of equations are consistent or not. If consistent, solve them.
$3 x + y + 4 = 0 a n d 6 x + 2 y + 4 = 0$

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Solution

$3 x + y + 4 = 0, 6 x + 2 y + 4 = 0$
By graphical method,

From graph, the two lines are parallel, so they have no solution.

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Question 4 (iii)
Which of the following pairs of linear equations are consistent/ inconsistent? If consistent, obtain the solution graphically:
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By the graphical method, find whether the following pair of equations are consistent or not. If consistent, solve them.3x+y+4=0 and 6x+2y+4=0

3x+y+4=0,6x+2y+4=0By graphical method,From graph, the two lines are parallel, so they have no solution.

By the graphical method, find whether the following pair of equations are consistent or not. If consistent, solve them.
$3 x + y + 4 = 0 a n d 6 x + 2 y + 4 = 0$

$3 x + y + 4 = 0, 6 x + 2 y + 4 = 0$
By graphical method,

From graph, the two lines are parallel, so they have no solution.