Răspuns :
[tex]\it 2x+2y=14\ \ \ \ \ (*)\\ \\ 3x+2y=18 \Rightarrow x+2x+2y=18\ \stackrel{(*)}{\Longrightarrow}\ x+14=18|_{-14} \Rightarrow x=4[/tex]
[tex]\it 2x+2y=14\ \ \ \ \ (*)\\ \\ 3x+2y=18 \Rightarrow x+2x+2y=18\ \stackrel{(*)}{\Longrightarrow}\ x+14=18|_{-14} \Rightarrow x=4[/tex]