1.
9+2х<5<br>2x<5-9<br>2x < - 4
x< - 2
( - ∞; -2)
(10-3x)/4
10-3x <4<br>- 3x<4-10<br>- 3x < -6
x>2
(2; ∞)
(5x-13)/7
5x-13 <7<br>5x < 7+13
5x < 20
x<4<br>( -∞; 4)
(2x+5)/3
2x+5 <3<br>2x<3-5<br>2x < -2
x< - 1
( -∞; - 1)
2.
(2-x)/3
2-x ≥ 3
- x≥3-2
x ≤ -1
(-∞; -1]
(3x+7)/10
3x+7≥10
3x≥10-7
3x≥3
x≥1
[1; ∞)
(5-2x)/9
5-2x≥9
- 2x≥9-5
- 2x ≥ 4
x≤ -2
( -∞; -2]
(7x-8)/6
7x-8≥6
7x ≥ 6+8
7x ≥14
x≥2
[2; ∞)