Question

George, Marian si Benjamin au impreuna 605 timbre. Marian are de doua ori mai mult decat George si cu cinci mai putin decat Benjamin. Cate timbre au fiecare?

Answer 1

Răspuns:

Raspuns  -  120 timbre are George

                - 240 timbre are Marian

                - 245 timbre are beniamin

Explicație pas cu pas:

|-----|   George

|-----|-----|   Marian

|-----|-----|  +5   Beniamin

605-5=600

Avem 5 segmente egale

600÷5=120 timbre are George

120x2=240 timbre are Marian

240+5=245 timbre are Beniamin

Verificare  -  120+240+245=605 timbre

Answer 2

G + M + B = 605

G = M/2

B = M + 5

M/2 + ²⁾M + ²⁾M + ²⁾5 = ²⁾605

M + 2M + 2M = 1210 - 10

5M = 1200

M = 1200 : 5

M = 240 timbre

G = 120 timbre

B = 245 timbre