4.
а) \(\displaystyle X=\begin{pmatrix}16&-32\\-6&13\end{pmatrix}\)
б) \(\displaystyle X=\begin{pmatrix}\lambda&\mu\\2-2\lambda&1-2\mu\end{pmatrix},\quad \lambda,\mu\in\mathbb R\)
в) Решений нет.
г) \(\displaystyle X=\begin{pmatrix}-3&2&0\\-4&5&-2\\-5&3&0\end{pmatrix}\)
д) \(\displaystyle X=\begin{pmatrix}24&13\\-34&-18\end{pmatrix}\)
е) \(\displaystyle X=\begin{pmatrix}0&\frac16\\0&0\end{pmatrix}\)
