equation system analyze

Given equation system:

$ \begin{cases} x + 2y -1 =0;\\ 2x + y -y =0;\\ 4x + 5y - 6=0;\\ \end{cases}\\ $

At least in three sentences analyze this situation. What happens if x and y are lines?

I know that determinant is 0, so there is no solution. What else could I say?