Réponses

2014-06-03T20:08:25+02:00
Bonsoir

2x - 6y = -8
3x + 2y = 21


2 x - 6y =  - 8
9x + 6y = 63

11x = 55
x = 5

10 - 6y = -8
- 6y = - 8 -10
- 6y = - 18
y = 3

Vérification

3x +2y = 21
15 + 6 = 21