Question

решите уравнения -3 меньше 2 х- 9 меньше или равно 1

Answer 1

3<x<=5 ........................

Answer 2

$left { {-3 textless 2x-9} atop {2x-9 leq 1}} right. .. left { {6 textless 2x} atop {2x leq 10}} right. left { {3 textless x} atop {x leq 5}} right. 3 textless x leq 5 (3;5]$