An apology might be all that lies between you and free algebra help, should you want it. The general aim of people who answer questions from students on AAH is to tell the students how to approach a problem. If you have a way to solve a problem, post it. If you can put the emphasis on making the student understand what you have done, rather than just presenting her with an answer and some working, then so much the better. If you are unsure of your answer, feel free to post it, but make it clear that you are not sure of your answer.
Teaching is often the best way to learn.
Also, if you guess an answer to a problem, you will help yourself more than if you just ignore the question. Even if you answer incorrectly, you are developing your intuition, one of the most vital tools for any mathematician. If your answer is right, then yes. However, make sure that the person you send the e-mail to is the same person that asked the question. This is a very frequent question.