Răspuns:
Explicație pas cu pas:
5x+y=11 y=11-5x y=11-5x y=11-5x y=11-5x ..,,....
2x+3y=7 2x+3y=7 2x+3(11-5x)=7 2x+33-15x=7 -13x=7-33 -13x=-26
.......,,...... ........,,... y=11-5.2 y=1
x=26:13 x=2 x=2 x=2
