Chapter 1.1, Problem 10E

Consider a system of the form

$\begin{array}{l}{a}_{11}{x}_1+a_{12}{x}_2=0\\ a_{21}{x}_1+a_{22}{x}_2=0\end{array}$

where $a_{11},a_{12},a_{21},$ and $a_{22}$ are constants. Explain why a system of this form must be consistent.