Răspuns:
6x+4- 6y +3= 1 6x-6y= 1-7 6x-6y=-6 /:6
3x+6y -2x-2y +4= 18 x+ 4y=18-4 x+4y=14
x-y=-1 => x= y-1 inlocuim in a 2 ecuatie
y-1+4y=14 5y= 14+1=15 5y=15 => y=15:5=3 y=3
x=3-1=2 x=2
