So i am totally off the wall confused, with this:

-y1 - y2 - y3 <= -1 (1)

y1 - y2 + 5y3 <= 0 (2)

y1 + 2y2 - y3 <= 1 (3)

Then the question is:

Find nonengative scalars d1, d2, d3 such that d1 x (1) + d2 x (2) + d3 x (3) gives the inequality 0<=-1.

I don't understand... and i am getting really frusturated because we never did anything like this yet again in class.

Any suggestions?