Adunand un numar natural a este cu dublul precedentului sau si cu triplul succesorului sau,obtinem 1999.Afla nr a.

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29 Agustus 2025 matematica 5 minute
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Clasă: Education Materie: matematica
Adunand un numar natural a este cu dublul precedentului sau si cu triplul succesorului sau,obtinem 1999.Afla nr a.
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predecesorul sau este a-1 si succesorul este a+1
deci
a+(a-1)*2+(a+1)*3=1999
a+2a-2+3a+3=1999
6a+1=1999
6a=1998
a=333
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