1. The problem statement, all variables and given/known data 3. The attempt at a solution I can't figure out how to do this problem. If you set the matrix up like this 2 -1 2 1 3 1 1 1 You can't solve it because there are 3 unknowns and two equations. I still don't really understand quite well when you set the matrix up vertically or horizontally but if you set it up like this 2 3 -1 1 2 1 there's no place to put the values for x and y to solve things.