Bodybuilding and Training with Weights

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?

I'm not an expert, but If I were doing that kind of stuff, I'd imagine that if you lifted with your weak arm for 5 months straight only, that should even it out for you.

Good luck