Réponses

Meilleure réponse !
2014-05-11T12:11:34+02:00
Résoudre des équations :

4x - 8 = - 3 + 6
4x = - 3 + 6 + 8
4x = 11
x = 11/4

(7 + 3x) - 4(x - 2) = 0
(7 + 3x) - 4x + 8 = 0
3x - 4x = - 7 - 8
-x = - 15
x = 15

8(5 - 6) (7x - 4) = 0
(40 - 48) (7x - 4) = 0
280x -160 - 336 + 192 = 0
280x = 160 + 336 - 192
280x = 304
x = 304/280
x =  8 x 38 / 8 x 35
x = 38/35

3x - (- 7 - 2x) = 0
3x + 7 + 2x = 0
3x + 2x = - 7
5x = -7
x = -7/5