Răspuns :
15.
a+b+c=84
a,b,c=nr. pare consecutive
x+x+2+x+4=84
3x=84-4-2
3x=78
x=26
a=26
b=26+2=28
c=26+4=30
V:26+28+30=84
a+b+c=84
a,b,c=nr. pare consecutive
x+x+2+x+4=84
3x=84-4-2
3x=78
x=26
a=26
b=26+2=28
c=26+4=30
V:26+28+30=84