bonjour
2 x + 3 = 4
2 x = 4 - 3
2 x = 1
x = 1 /2
2 x + 6 = 0
2 x = - 6
x = - 6/2 = - 3
-3 x + 64 = 19
- 3 x = 19 - 64
- 3 x = - 45
x = - 15
x² - 4 = 0
( x - 2 ) ( x + 2 ) = 0
x = 2 ou - 2
3 x - 4 < 8
3 x < 8 + 4
3 x < 12
x < 4
9 x - 5 < 5 x - 1
9 x - 5x < - 1 + 5
4 x < 4
x < 1
6 x - 7 < 7 x + 5
6 x - 7 x < 5 + 7
- x < 12
x > - 12
continue, je t'ai fait les 2 cas possibles
