No, You can not answer your own Question.
If you write your own question’s answer, that means, you know your question’s answer. If you know the answer of your question, then why have you ask this website? If you know the answer, you do not need to ask question.
You have asked a question that means you don’t know the answer. or you have faced a problem and you have asked for your solution.
Another person will provide the answer of your question and you will get the solution.