Given equation system:

$\displaystyle

\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?