Question

84⋮x,180⋮x và x≥6

Answer 1

\(ƯC\left(84,180\right)=Ư\left(12\right)=\left\{1;2;3;4;6;12\right\}\\ \Rightarrow x\in\left\{6;12\right\}\)

Answer 2

x={6;12}