Question

ajutor e ft urgentttt dau coronita

Answer 1

$\it \overline{abc}=\overline{ab0}+c =10\cdot\overline{ab}+c$

Egalitatea din enunț devine:

$\it 10\cdot\overline{ab}+c-\overline{ab}-c=486 \Rightarrow 10\cdot\overline{ab}-\overline{ab}=486 \Rightarrow \overline{ab}\cdot(10-1)=486 \Rightarrow\\ \\ \Rightarrow \overline{ab}\cdot9=486|_{:9} \Rightarrow \overline{ab}=54$

$\it \overline{abc}\in\{540,\ 541,\ 542,\ ...,\ 459\}$