Expressing a non-trivial linear dependency relationship

I've been ask to see if a set of vectors is linearly independent, and if not, find a non-trivial linear dependency relationship.

I believe I've correctly determined that the set is linearly dependent and found the solution, but I don't know how I'm meant to express the linearly dependency relationship??

This is what I have so far:

As a matrix, then reducing:

If we let , then and . I believe this is the non-trivial linear dependency relationship, but I don't know if that the right way to leave it? Any help would be greatly appreciated.