Question

Укажите какие-нибудь три решения системы: {х+у=6 и 2х+2у=12 }

Answer 1

$2)\left \{ {{y=6-x} \atop {2x+2(6-x)=12}} \right. \left \{ {{y=6-x} \atop {2x+12-2x=12}} \right. \left \{ {{y=6} \atop {x=0}} \right. \\$$1) \left \{ {{x=6-y} \atop {2x+2y=12}} \right. \left \{ {{x=6-y} \atop {2(6-y)+2y=12}} \righ \left \{ {{x=6-y} \atop {12-2y+2y=12}} \right. \left \{ {{x=6} \atop {y=0}} \right \left \{ {{y=6-x} \atop {2x+2(6-x)=12}} \right. \left \{ {{y=6-x} \atop {2x+12 }} \right. \\$