Question

Tim so tu nhien x sao cho :

x ⋮ 5 va 13 < x ≤ 78

12 ⋮ x va x > 4

Answer 1

\(a,x\in\left\{15;20;...;70;75\right\}\\ b,x\in\left\{6;8;12\right\}\)

Answer 2

\(x\) \(⋮\) \(5\) và \(13 < x \) \(\le\) \(78\)

\(x = \) \(\left\{15;20;25;30;35;40;45;50;55;60;65;70;75\right\}\)

\(12\) \(⋮\) \(x\) và \(x > 4\)

\(x = \) \(\left\{6;12\right\}\)