Răspuns :
a + b + c = 57
a = 35
c = b + 2
35 + b + 2 + b = 57
2b = 57 - 35 - 2
b = 20 : 2
b = 10
c = 10 + 2
c = 12
35 + 10 + 12 = 57
a = 35
c = b + 2
35 + b + 2 + b = 57
2b = 57 - 35 - 2
b = 20 : 2
b = 10
c = 10 + 2
c = 12
35 + 10 + 12 = 57
[tex]x+y+z=57 \\ x=35 \\ y=z+2 \\ 35+z+2+z=57 \\ 2z+2=57-35 \\ 2z=22-2 \\ 2z=20 \\ z=20:2 \\ \boxed{z=10} \\ y=z+2=10+2 \\ \boxed{y=12}[/tex]