Odpowiedź:
[tex]\left \{ {{x+3y=6} \atop {2x-y=-16}} \right.[/tex]
[tex]\left \{ {{x=6-3y} \atop {2*(6-3y)-y=-16}} \right.[/tex]
[tex]\left \{ {{x=6-3y} \atop {12-6y-y=-16}} \right.[/tex]
[tex]\left \{ {{x=6-3y} \atop {-7y=-16-12}} \right.[/tex]
[tex]\left \{ {{y=6-3y} \atop {-7y=-28/:-7}} \right.[/tex]
[tex]\left \{ {{x=6-3x} \atop {y=4}} \right.[/tex]
[tex]\left \{ {{x=6-3*4} \atop {y=4}} \right.[/tex]
[tex]\left \{ {{x=6-12} \atop {y=4}} \right.[/tex]
[tex]\left \{ {{x=-6} \atop {y=4}} \right.[/tex]
(x,y)=(-6,4)
Szczegółowe wyjaśnienie:
