
Phillip R. answered 09/17/14
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x - 6 = 0 is the same as x = 6
the points that lie on this vertical line are all points with x=coordinate of 6. Y-coordinate can be any number.
So the points (solutions) are (6,0) (6, 1) (6, 2.34576898) (6, 2009.47593) etc, etc