Réponses

Meilleure réponse !
2014-10-01T16:20:35+02:00
8x -20 = 9x -6
8x -9x = +20 -6
-x = +14
x = -14
  • Utilisateur Brainly
2014-10-01T16:23:43+02:00
8x - 20 = 9x - 6
8x - 9x = - 6 + 20
- x = 14
x = - 14