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Rezolvati ecuatia :-2x + y = -4

Răspuns :

[tex]2x-y=4 \Longleftrightarrow2(x-3)=y-2 \Rightarrow y-2=2k \Rightarrow \left \{ {{y=2(k+1)} \atop {x=k+3}} \right. [/tex]