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a fost răspuns

Vlad cheltuieste 25% dintr-o suma de bani, apoi trei cincimi din rest,ramanandu-I 240 lei.Ce suma a avut initial Vlad?

Răspuns :

S – 25/100xS = 75/100xS
75/100xS – 3/5x75/100xS=30/100xS
30/100xS=240 S=240x100/30 = 800



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