Bonjour
Résoudre les équations :
2x + 3 = 7
2x = 7 - 3
2x = 4
x = 4/2
x = 2
2y-4-12-6y = - 4y - 16
1-3t=10
- 3t = 10 - 1
- 3t = - 9
t = 9/3
t = 3
2 (x + 3) = 7
2x + 6 = 7
2x = 7 - 6
2x = 1
x = 1/2
3x + 1 = 7
3x = 7 - 1
3x = 6
5 (2-1) +3 (2-x) = 0
10 - 5 + 6 - 3x = 0
- 3x = - 10 - 6 + 5
- 3x = - 11
x = 11/3
(x + 2) (X +1) = (x + 4) (x-5)
x² + x + 2x + 1 = x² - 5x + 4x - 20
x² - x² + x + 2x + 5x - 4x = - 20 - 1
4x = - 21
x = - 21/4
