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I am posting this as an answer and not as an comment, since I believe a weak point of askSage is the fact that it is too easy to no notice a comment (at least this is what happened to me on several occasions).
I am not sure what you mean by "intermediate algebra", and in fact you did not ask a question.
Is your question "How can one solve an arbitrary equation in one variable numerically (in complex numbers)?" or "How can one solve an arbitrary equation in one variable symbolically?" or "How can one solve an arbitrary linear equation over an arbitrary field?" or "For homework, I have to find z such that 3+z-13=z+2; what is the solution to that equation?"?
The answer will depend on the question.
