Yes, as in already corrected (without explanation). I'm trying to find out what I did wrong before I am quizzed on this. I thought that would be compatible with the rules?
I think, now, that my mistake involved forgetting to subtract the vector I found (3, 3, -7, -7) from w, the target vector. (Found this idea on Wiki, of all places). Just wondering about the theory behind this, if anyone can explain the concept.