Is it possible to turn the parametric equation of a line in 3 dimensions into the general equation?

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I Know it is impossible to do so since the parametric equation for a plane is the intersection of $2$ planes.For example:

$x$ $=$ $\frac{-5}{4t}+\frac{1}{4}$;

$y=\frac{3}{4t}+\frac{5}{4}$;

$z=t$

But when I combine any of the 2 equations above, I can only get the relationship between $x $ and $y$; $x$ and $z$ or $y$ and $z$, that is, $3$ lines in two dimensions. So but the intersection of $2$ planes yields for only $1$ line. So, don't they contradict with one another?

And I also have 2 associated questions:

  1. How to use the parametric equation of a line in three dimensions to get the equations of intersecting planes?

2.How to use the parametric equation of a line in three dimensions to get the equations of the line derive from the intersection of 2 planes?