Question

решите неравенства номер 1069

Answer 1

|1+2x|<9
1+2x<9
2x<8
x<4
x>=-4
[-4;4)

|3+2x|<=5
3+2x<=5
2x<=2
x<=1
x>=-4
[-4;1]

|1-2x|>=7
1-2x>=7
-6>=2x
-3>=x
x>=4
(-&;-3] [4;+&)