For example, let the plane's equation is 2*x+3*y+4*z=5, and the line
is given as <x,y,z>=<t-1,2*t-3,2-t>. Then the point of their
intersection can be found in Sage as follows,
var('t');
x,y,z=t-1,2*t-3,2-t
plane=2*x+3*y+4*z-5
a=solve(plane,t)[0]
[i.subs(a) for i in x,y,z]
[1, 1, 0]
Alec
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