Đáp án: $n\in\{-2,-1,1,5,13,-4,-5,-7,-11,-19\}$
Giải thích các bước giải:
Vì $2n-10\quad\vdots\quad n+3$
$\to 2(n+3)-16\quad\vdots\quad n+3$
$\to 16\quad\vdots\quad n+3$
$\to n+3\in\{1,2,4,8,16,-1,-2,-4,-8,-16\}$
$\to n\in\{-2,-1,1,5,13,-4,-5,-7,-11,-19\}$