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Erika si Ingrid au impreuna 324 nuci.Cat are fiecare ,daca Ingrid are de  3 ori mai putine ca Erika


Răspuns :

a+b=324
a=b:3

b:3+b=324
b+3b=972
4b=972
b=972:4
b=243

a=243:3
a=81
|-----|Ingrid
|-----|-----|-----| Erika
324:4=81 nuci are Ingrid
81x3=243 nuci are Erika