for a lot of exercises my right arm/leg is stronger than the left.
i am doing only dumbbell & bodyweight exercises.
is there a proper way to accomodate this?
right now i can curl probably 50lb w/ right and only 30 with left.
so i can undertrain the right and use the same weight on each arm, or is it ok to use heavier dumbbells on each side?
will i just keep the imbalance going if i do that?

you may have an injury bro....back off for a bit and see whether you can catch up, im a little stronger on my left side even though im right handed/footed, but im coordinated with my right side, i think i pick up more right sided injuries which may explain the extra strength on the left side...

Everybody has a stronger bodypart like with me, my left tricep is stronger than my right(not much though) and my right bicep is stronger than my left. I would do what yamaharob said. Always use same weight for each arm though. Train them equally and they should balance out over time.