Do not delete questions just because you got an answer.
Ask yourself: Is it likely that a future visitor will follow a similar thought process, make similar assumptions and end up with the same wrong conclusion as I did?
If you expect that might be true then your question (and its answers) have value and some day in the future someone else will benefit from your and others effort. Check your question to make sure it has the key elements clearly worded so Google can index it.
On the other hand, if you think no-one will ever land on the same issue again then a question and the answers don't have lasting value except for you. Deletion is then an option, assuming you didn't receive positive scoring answers.
It is worth noting that deleting questions can cause the quality mechanisms to kick-in. Asking and then deleting too many questions risks your account getting either rate limited or quality-banned, allowing you only one question every six months.
Optimize for future visitors is the best advice I can give.