[tex]\texttt{Notatii: } \\
\texttt{a = numarul oilor albe} \\
\texttt{n = numarul oilor negre} \\
\begin{cases}
a+n=300 \\
a-n=28
\end{cases} \\
--------------------- ~\texttt{adunam ecuatile. }\\
2a ~~~/ ~= 328 \\
a = 328 : 2 = \boxed{164\; de \;oi~albe} \\
n=300-a=300 -164 = \boxed{136\; de \;oi~negre }
[/tex]
