Find the equation of the plane mid-parallel to the planes `2x-3y+6z+21=0` and `2x-3y+6z-14=0`.

Find the equation of the plane mid-parallel to the planes 2x-2y+z+3=0 and 2x-2y+z+9=0 .

Find the equation of the point mid-parallel to the planes 2x-2y+z+3=0 and 2x-2y+z+9=0.

Find the equation of the plane mid parallel to the planes 2x-2y+z+3=0\ a n d\ 2x-2y+z+9=0.

Find the equation of the plane mid parallel to the planes 2x-2y+z+3=0\ a n d\ 2x-2y+z+9=0.

Find the equation of the plane through P(1,4,-2) and parallel to the plane -2x+y-3z=0

Find the equation of the plane through the intersection of the planes 2x - 3y + z - = 0 and x - y + z + 1 = 0 and perpendicular to the plane x + 2y - 3z + 6 = 0.

Find p if the plane x+y-2z+6=0 is parallel to the plane px+3y-6z-1=0.

Find the equation of the plane passing through the intersection of the planes 2x-3y+z-4=0 and x-y+z+1=0 and perpendicular to the plane x+2y-3z+6=0