Like many SE users, I have multiple accounts. I am wondering if I am allowed to write an answer with one, and vote for it with another?
I suspect the answer is no, but not being one to pass on rep, I thought I should ask.
Nope. If you do that, it will end badly for you.
You can have multiple accounts as long as they don't interact in any way, or do something that someone with a single account could not.
Thanks for asking first!
You shouldn't because you'll end up getting suspended for Voting Fraud.
Take a look at : What's the SO policy about having multiple user accounts?