Given equation system:
<br /> <br /> \begin{cases}<br /> x + 2y -1 =0;\\<br /> 2x + y -y =0;\\<br /> 4x + 5y - 6=0;\\<br /> \end{cases}\\<br />


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?