Mathematics, 11.02.2020 21:45 masontdavis

10. Steri mobiltelefon-koltsegeinek fedezésére feltöltőkártyát szokott vásárolni. A mobiltársaság ebben az esetben sem
elorzetes dijat sem hivasonkénti kapcsolási díjat nem számol fel. Csúcsidőben a percdij 25 forinttal drágább, mint
csues icon kivul. Stefi az elmúlt négy hétben összesen 2 órát telefonált és 4000 Ft-ot használt fel kartyaja egyenlegebol
ugy, hogy ugyanannyi pénzt költött csúcsidőn belüli, mint csúcsidőn kívüli beszélgetésekre. Hány percet beszélt Stefi
mobiltelefonján csúcsidoben az elmúlt négy hétben?

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10. Steri mobiltelefon-koltsegeinek fedezésére feltöltőkártyát szokott vásárolni. A mobiltársaság eb...