Răspunsuri

2014-09-11T18:01:45+03:00
Inmultim prima relatie cu -3
 \left \{ {{-3x+6y=-24} \atop {3x+y=3}} \right.
 \left \{ {{3x+y=3} \atop {7y=-21}} \right.
 \left \{ {{3x+y=3} \atop {y=-3}} \right.
 \left \{ {{y=-3} \atop {3x-3=3}} \right.
 \left \{ {{y=-3} \atop {3x=6}} \right.
 \left \{ {{y=-3} \atop {x=2}} \right.