I can do it without an alignment machine.
The problem is whether or not the person doing the alignment has the total toe set correctly or if it is just a tweak off-center. If the total toe is correct one could just loosen one tie rod jam nut, turn the tie rod while counting the jam nut flats, tightening the nut and then adjusting the opposite side the same number of flats. (adjust the tires to the side the wheel is turned towards)
To be fair, sometimes no matter what you do during an alignment the wheel will come out a hair off. I've done too many to waste time re-mounting the alignment heads, etc. to just tweak the wheel to center. Hopefully your alignment tech can fix you up in a few minutes.