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  • qais
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2016-03-15T11:17:30+05:30

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See, the given equation x -a =0 , a is a constant number,is a straight line and is always parallel to Y- axis.
if we write the equation again,
x -a =0
⇒x = a 
now, this line is to the right of Y- axis when a is a positive integer and it will be in the left of Y- axis , if the value of a is negative integer.
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