Răspuns :
Răspuns:
a+b=12
b+c=45
c+a=251
a+b+b+c+c+a=12+45+251
2(a+b+c)=308
a+b+c=154
(a+b+c):2=154:2=77
Răspuns:
a+b=12
b+c=45
c+a=251
a+b+b+c+c+a=12+45+251
2a+2b+2c=308
2(a+b+c)=308=>a+b+c=308:2=>a+b+c=154
(a+b+c):2=154:2=>a+b+c=77
Răspuns:
a+b=12
b+c=45
c+a=251
a+b+b+c+c+a=12+45+251
2(a+b+c)=308
a+b+c=154
(a+b+c):2=154:2=77
Răspuns:
a+b=12
b+c=45
c+a=251
a+b+b+c+c+a=12+45+251
2a+2b+2c=308
2(a+b+c)=308=>a+b+c=308:2=>a+b+c=154
(a+b+c):2=154:2=>a+b+c=77