H
hka_12_14


1/[TEX]\left\{ \begin{array}{l} x\sqrt{x} -y\sqrt{y}=2(4\sqrt{x}+sqrt{y} ) \\ x-3y=6 \end{array} \right.[/TEX]
2/[TEX]\left\{ \begin{array}{l} x^2+y^2+xy+2y+x=2 \\ 2x^2-y^2-2y-2=0 \end{array} \right. [/TEX]
2/[TEX]\left\{ \begin{array}{l} x^2+y^2+xy+2y+x=2 \\ 2x^2-y^2-2y-2=0 \end{array} \right. [/TEX]