Răspuns :
a+5=b atunci a =b-5
c-8=b atunci c=b+8
ecuatia arata asa
(b-5)+b+(b+8)=45
3b-5-8=45
3b=45+5-8
3b=42
b=14
a=14-5=9
c=14+8=22
proba
9+14+22=45
c-8=b atunci c=b+8
ecuatia arata asa
(b-5)+b+(b+8)=45
3b-5-8=45
3b=45+5-8
3b=42
b=14
a=14-5=9
c=14+8=22
proba
9+14+22=45