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I think that http://ask.sagemath.org/question/474/does-sage-show-steps-to-solving-an-equation has the answer to your question, which unfortunately is "no". You should consider asking the sage developers this question.

Note that there are various sites on-line that offer homework help. The first that springs to mind is http://math.stackexchange.com/ which states "Mathematics Stack Exchange is a question and answer site for people studying math at any level".