Question

Ana are de 4 ori mai multi bani decat Corina.Daca Ana cheltuiesc20 lei iar Corina primeste 28lei.Ana va aveade 2 orimai multi bani decit Corina Citi bani au fetele inpreuna

Answer 1

a = banii Annei  si  c = banii Corinei

=> a = 4c     daca  (a-20) = 2* (c+28)

      inlocuim ...     4c - 20 = 2c + 56

                            4c - 2c = 56 +20

                                   2c =76  =>  c = 38(lei) si

                                                      a = 4*38 =152(lei)