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Determinatii numerele [tex]x, y, z, t[/tex] dacă are loc egalitatea:

[tex]3\left([tex]\begin{array}{rr}1 & -1 \\ x & -2 y\end{array}\right)-2\left(\begin{array}{rr}z & -3 t \\ 1 & 5\end{array}\right)=\left(\begin{array}{rr}-1 & 1 \\ 1 & 2\end{array}\right)[/tex][/tex]