##### Item

A linear equation is one that may be written in the form

\begin{equation*} a_1x_1 + a_2x_2 + \ldots + a_nx_n = b \text{.} \end{equation*}A linear equation is one that may be written in the form

\begin{equation*} a_1x_1 + a_2x_2 + \ldots + a_nx_n = b \text{.} \end{equation*}