I have got five vocal tracks that I EQ'ed the exact same way, and now
with them together in the mix, I wish I hadn't boosted their highs.
Instead of going back and re-EQing each track, which in this case will
take a long time, I'm wondering if I get the exact same effect by
simply lowering the same EQ frequencies I had previously boosted, but
doing it to the two tracks I have already bounced the vocals down to.

I'm a novice, and so my goal is to do the least editing possible. If
pulling the same EQ down now will neutralize the raised EQ, then I'll
do it. And that's what I think should happen. When I do it, it
sounds alright, though I can't say I trust my ears 100%. But if it is
going to do something complicated that I have not thought about, then
maybe I should go back and redo the whole thing.

Thanks.