Taking the question as example, where someone solved the problem for the author whereas mine was related to hint (cause there's some steps left to think/solve). But -1 on my answer is for what? Solving a homework question isn't our goal. IIRC, it's (solving homework for someone) against the rules also.
Given that the question is closed (and obviously close-worthy under our homework-and-exercises policy), I would submit that no one should have answered the question in the first place, full answer or not. I see no point in litigating individual votes on answers to off-topic questions.