Bonjour
Résoudre les équations suivantes :
1) 3x + 7 = -4x + 2
3x + 4x = 2 - 7
7x = - 5
x = - 5/7
2) 5/3x + 1/2 = 2x + 4/7
5/3x - 2x = 4/7 - 1/2
5/3x - 6/3x = 8/14 - 7/14
- 1/3x = 1/14
- 14x = 3
x = - 3/14
3) 5(3x + 1) + 4 = 13
15x + 5 + 4 = 13
15x = 13 - 5 - 4
15x = 4
x = 4/15
4) 5x°+ 3 = 9 ?
5x² - 6 = 0
