In Roman Numeration, the symbol $$X$$ can be subtracted from ______, $$M$$ and $$C$$ only.
In Roman Numeration,
$$X$$ stands for $$10$$
$$L$$ stands for $$50$$
$$C$$ stands for $$100$$
$$M$$ stands for $$1000$$
So, in Roman Numeration, the symbol $$X$$ can be subtracted from $$\boxed{L}$$, $$M$$ and $$C$$ only.