Question

1 kg de banane costa 4,35 lei,iar unul de portocale costa 2,98 lei.Maria a cumparat in total 7 kg de fructe(banane si portocale)platind in total suma de 23,60 lei.Sa se afle cate kg de banane si cate de portocale a cumparat.Ma ajutati?Va rog!!

Answer 1

1kg[banane]=4,35[lei];
1kg[portocale]=2,98[lei];
7kg[banane+portocale]=23,60[lei];
⇒2kg[banane]=4,35[lei]·2=8,7[lei];
⇒5kg[portocale]=2,98[lei]·5=14,9[lei];
2kg+5kg=7k[banane+portocale];
⇒8,7[lei]+14,9[lei]=23,6[lei];