Answer:
The equation of plane is x-y+z=12.
Explanation:
It is given that the plane passing through the point (0,0,6) perpendicular to x=1-t y=2+t z=4-2t.
The given line is perpendicular to required plane, so coefficients of t represents the normal vector.
Normal vector is

If a plane passes through
and having normal vector
, then the equation of plane is




Multiply both sides by -1.

Therefore, the equation of plane is x-y+z=12.