Răspuns:
Explicație pas cu pas:
papusa + ursulet + iepuras + minge
papusa + iepuras + minge = 40 RON
papusa + ursulet + iepuras = 45 RON
papusa + ursulet + minge = 44 RON
ursulet + iepuras + minge = 27 RON
Observi ca daca adunam totul avem fiecare obiect de cate 3 ori
3 x (papusa + ursulet + iepuras + minge) = 40 + 45 + 44 + 27 = 156 RON
papusa + ursulet + iepuras + minge = 156 : 3 = 52 RON
papusa + iepuras + minge = 40 RON
ursulet = 52 - 40 = 12 RON
papusa + ursulet + iepuras = 45 RON
minge = 52 - 45 = 7 RON
papusa + ursulet + minge = 44 RON
iepuras = 52 - 44 = 8 RON
ursulet + iepuras + minge = 27 RON
papusa = 52 - 27 = 25 RON