Split hints

There should probably be two hints here. One should be something about rref but telling them to wait before just charging through a rref computation and see how they can save a step.

Either row-reduction is a single step, so we don't save hardly any work after all. But sure, I split the hint according to your suggestion.

I think it reads better this way - I like this hint a bit more. Though you're right I guess you could rref then just transpose it... I think this is the more standard approach.