K
keepsmile123456


1.[TEX]\left{\begin{\sqrt{x+y+1}+1=4(x+y)^2 +\sqrt{3(x+y)}}\\{2x-y=3/2} [/TEX]
2..[TEX]\left{\begin{\sqrt{x^2+x+y+1}+x +\sqrt{y^2+x+y+1}+y =18}\\{\sqrt{x^2+x+y+1}-x +\sqrt{y^2+x+y+1}-y =2} [/TEX]
2..[TEX]\left{\begin{\sqrt{x^2+x+y+1}+x +\sqrt{y^2+x+y+1}+y =18}\\{\sqrt{x^2+x+y+1}-x +\sqrt{y^2+x+y+1}-y =2} [/TEX]