Školjka

%V0 Riješite sustav jednadžbi $$$ \begin{align*} 2(x^2 + y^2)- 3xy + 2(x + y) - 39 &= 0, \\ 3(x^2 + y^2)- 4xy +\hphantom{2}(x + y) - 50 &= 0. \end{align*} $$$