I am studying now for a Math methods SAC after the holidays. The teacher has given the class some revision questions and I have come across one question, which I don't have a proper way to approach. The text book doesn't explain much about these questions and does not provide any examples for me to follow.
So here is one of the questions.
Solve each of the following by making $m$ the subject.
$$ d = 4x + m $$
If someone could explain how one should approach these types of questions it would be a great help. I don't need the answer to the question for me (I would prefer that you don't answer it), just how I would start to answer it and what is involved.