👤

Cristi are cateva baloane rosii si cu 4 mai putine baloane albastre. Cate baloane are de fiecare fel are Cristi daca in total are 20 baloane.

Răspuns :

a+a+4= 20 a+a=20-4 a+a = 16 2a =16 a=16:2 a= 8 8 baloane albastre Puncte? 8+4= 12 baloane rosii Proba 12+8=20