a+b=5068
a-b=432
Adunam cele doua fractii astfel
a+b+a-b=5068+432
-b cu +b se anuleaza si atunci
2a=5500 => a=5500:2=2750
2750-b=432 => b=2750-432=2318
Varianta 2
a+b=5068 => a=5068-b
Inlocuim in
a-b=432 => 5068-b-b=432 =>
5068-2b=432 => 2b=5068-432=4636 => b=4636:2=2318
a+2318=5068
a=5068-2318=2750
