This question already has an answer here:
Suppose I have question, which appropriate to ask on two (or more) different SE sites. Since the audience is different on different sites, I would like to attract all people, who can answer.
How should I ask such a question?
If I duplicate the text it is inconvenient for me and moderators, since one needs to synchronize editing of each question. It will become messy.
If I simply give a link it is inconvenient for those who answer.
There is a related question: What to do with cross-site duplicates? but it is for moderators, not for users who ask.