Question

Inecuatia : 9 < sau = x-2 < sau = 27

Answer 1

9 ≤  x -2 ≤ 27      / +2 
9 +2  ≤ x  ≤ 29 
11 ≤ x ≤ 29 
in R           x ∈ [11, 29 ] 
in Z           x ∈{ 11.12......, 29 }