2021-08-01から1ヶ月間の記事一覧
[tex: \begin{eqnarray}\left\{\begin{array}{l}x + y = 10 \\2x + 4y = 32\end{array}\right.\end{eqnarray} ]
[tex: \begin{eqnarray}\left\{\begin{array}{l}x + y = 10 \\2x + 4y = 32\end{array}\right.\end{eqnarray} ]
