Question

care numar natural are suma vecinilor sai egala cu 10?

Answer 1

Numarul 5.
4+6=10
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Answer 2

[tex]a->numarul\\ a-1\\ =>vecinii \\ a+1\\ a-1+a+1=10\\ 2a=10\\ a=10:2\\ \boxed{a=5}\\ Proba:\\ 5-1=4\\ 5+1=6\\ 4+6=10 ~=>\boxed{ADEVRAT}[/tex]