Ce se poate din ce e incercuit dau coronița cand imi apare

Răspuns:
Explicație pas cu pas:
10.
2x - 1 ≥ 7
2x ≥ 8
x ≥ 4
___________
2x + 3 ≥ -9
2x ≥ -12
x ≥ -6
___________
3x - 1 ≥ 8
3x ≥ 9
x ≥ 3
____________
4x + 1 < 9
4x < 8
x < 2
____________
5x - 9 < -24
5x < -15
x < -3
____________
3 + 4x ≥ 7
4x ≥ 4
x ≥ 1
____________
6 + 2x ≥ 0
2x ≥ -6
x ≥ -3
______________
-5 + 3x < -8
3x < -3
x < -1
_______________
2x - 7 ≥ -19
2x ≥ -12
x ≥ -6
________________
-11 + 12x < -23
12x < -12
x < -1
______________
1 - 7x ≥ -20
7x ≤ 21
x ≤ 3
____________
3 - 4x < 7
4x > -4
x > -1
____________________________
11.
2x - 2 < -6
2x < - 4
x < -2
___________
3x + 3 < -18
3x < - 21
x < -7
____________
4x + 8 ≥ -8
4x ≥ -16
x ≥ -4
____________
2x + 16 ≤ -10
2x ≤ -26
x ≤ -13
__________
5x - 5 < 0
5x < 5
x < 1
__________
2x + 10 + 3 < -9
2x <-22
x < -11
__________
3 + 2x + 4 < 5
2x < -2
x < -1
____________
1 + 4x - 4 < -7
4x < -4
x < -1
____________
10 - 15x < -5
15x > 15
x > 1
______________________
12.
x > -80/3
_____________
x < 1/5
_____________
x ≤ -3/2
_____________
x ≥ -10/7
___________
3x > -13
x > -13/3
___________
5x ≤ 2
x ≤ 2/5
___________
5x ≤ 14
x ≤ 14/5
__________
6x - 3 ≤ x -14
5x ≤ -11
x ≤ -11/5
[tex]\it 10)\ x\in\mathbb{Z}\\ \\ a)\ 2x-1\geq7 \Rightarrow 2x\geq8 \Rightarrow x\geq4 \Rightarrow S=\{4,\ 5,\ 6,\ ...\}\\ \\ b)\ 2x+3\geq-9 \Rightarrow 2x\geq-12 \Rightarrow x\geq-6 \Rightarrow S=\{-6,\ -5,\ -4,\ -3,\ ...\}\\ \\ c)\ 3x-1\geq8 \Rightarrow 3x\geq9 \Rightarrow x\geq3 \Rightarrow S=\{3,\ 4,\ 5,\ ...\}\\ \\ d)\ 4x+1<9 \Rightarrow 4x<8 \Rightarrow x<2 \Rightarrow S=\{...,\ -2,\ -1,\ 0,\ 1\}[/tex]
[tex]\it k)\ 1-7x\geq-20 \Rightarrow -7x\geq-21|_{\cdot(-1)} \Rightarrow 7x\leq21 \Rightarrow x\leq3 \Rightarrow \\ \\ \Rightarrow S=\{...,\ -2,\ -1,\ 0,\ 1,\ 2,\ 3\}[/tex]