Система линейных уравнений ⎧⎩⎨⎪⎪⎪⎪x1+2x2+3x3=143x1+2x2+x3=10x1+x2+x3=62x1+3x2−x3=5{x1+2x2+3x3=143x1+2x2+x3=10x1+x2+x3=62x1+3x2−x3=5 \begin{equation*}
\begin{cases}
x_{1}+2x_{2}+3x_{3}=14 & \\
3x_{1}+2x_{2}+x_{3}=10 & \\
x_{1}+x_{2}+x_{3}=6 & \\
2x_{1}+3x_{2}-x_{3}=5 & \\
\end{cases}
\end{equation*} ...