1)xy=6 x-y=1x=1+y (1+y)y=6y+y^2-6=0|y=2 или |y=-3|x=3 |y=-22)x^2-3y^2=1 и x-2y=1x=1+2y(1+2y)^2-3y^2=11+4y+4y^2-3y^2-1=0y^2+4y=0y(y+4)=0|y=0 или | у=-4|х=1 |x=-73) x^2+2y^2=36+3x^2-2y^2=-204x^2=16x=+-2y=+-44)xy-3y^2=-24-xy+2y^2=21-5y^2=-45y^2=9y=+-3x=+-1