$+$ | $+$ | = | $564$ | |||
$+$ | $+$ | = | $873$ | |||
$+$ | $+$ | = | $864$ |
$+$ | $+$ | = | $\text{?}$ |
${x}_{1}=$ | ${x}_{2}=$ | ${x}_{3}=$ |
$\begin{array}{ccc}\multicolumn{1}{c}{\left(\begin{array}{ccc}\hfill 2& \hfill 0& \hfill 1\\ \hfill 1& \hfill 0& \hfill 2\\ \hfill 0& \hfill 1& \hfill 2\end{array}\right)\xb7\left(\begin{array}{c}\hfill {x}_{1}\\ \hfill {x}_{2}\\ \hfill {x}_{3}\end{array}\right)}& =\hfill & \left(\begin{array}{c}\hfill 564\\ \hfill 873\\ \hfill 864\end{array}\right)\hfill \end{array}$ |
${x}_{1}=85,\hspace{0.5em}{x}_{2}=76,\hspace{0.5em}{x}_{3}=394.$ |
$+$ | $+$ | $=$ | ||||
${x}_{1}$ | $+$ | ${x}_{2}$ | $+$ | ${x}_{3}$ | $=$ | |
$85$ | $+$ | $76$ | $+$ | $394$ | $=$ | $555$. |