bonjour
2 x +2 = 1 8
2 x = 16
x = 8
4 x + 3 = 10
4 x = 7
x = 7 /4
x /2 = 45 /3
3 x = 90
x = 30
2 x - 1 > x + 3
2 x - x > 4
x > 4
x + 1 ≤ 4 x - 14
x - 4 x ≤ - 14 - 1
- 3 x ≤ - 15
x ≥ 5
x - 8 < 0
x < 8
- 2 x + 1 ≤ 14
- 2 x ≤ 13
x ≥ - 13/2
1.1 x = 22 000
x = 20 000
0.8 x = 100
x = 125
2 x + 10 < 30