bạn vào link này : https://olm.vn/hoi-dap/tim-kiem?q=Bi%E1%BA%BFt+60+chia+h%E1%BA%BFt+cho+x+,90+chia+h%E1%BA%BFt+cho+x+,120+chia+h%E1%BA%BFt+cho+x+,v%C3%A0+x+L%E1%BB%9Bn+h%C6%A1n+7+?&id=239132
Bạn nhớ cho mình 1 like nhé !
Ta có: \(60⋮x\)
\(\Leftrightarrow x\in\left\{1;2;3;4;5;6;10;12;15;20;30;60\right\}\)
mà 10<x<20
nên \(x\in\left\{12;15\right\}\)