[tex]\it Suma\ a\ trei\ numere\ naturale\ consecutive\ este\ egal\breve{a}\ cu\ 54.\\ \\ Determina\c{\it t}i\ numerele.\\ \\ \\ Rezolvare:\\ \\ Trei\ numere \ naturale\ consecutive\ se\ pot\ scrie\ a+1,\ a,\ a-1.[/tex]
[tex]\it Suma\ lor\ este:\\ \\ a+1+a+a-1=54 \Rightarrow 3a=54|_{:3} \Rightarrow a = 18\\ \\ \\ Numerele\ cerute\ sunt\ : \ \ 17,\ 18,\ 19.[/tex]
