a fost răspuns

Rezolvati sistemul de ecuatii: [tex] \left \{ {{x-2y=8} \atop {3x+y=3}} \right. [/tex]
Rezultatul este: x=2, y=-3
Imi trebuie rezolvarea!!!Urgenttttttttttttttt :***

Răspuns :

Munmncid
inmultim prima relatie cu -3
[tex] \left \{ {{-3x+6y=-24} \atop {3x+y=3}} \right. [/tex]
[tex] \left \{ {{3x+y=3} \atop {7y=-21}} \right. [/tex]
[tex] \left \{ {{3x+y=3} \atop {y=-3}} \right. [/tex]
[tex] \left \{ {{y=-3} \atop {3x-3=3}} \right. [/tex]
[tex] \left \{ {{y=-3} \atop {3x=6}} \right. [/tex]
[tex] \left \{ {{y=-3} \atop {x=2}} \right. [/tex]

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