Réponses

2014-06-14T13:52:37+02:00
3x+7 = x+2
3x-x+7 = x-x+2
2x+7 = 2
2x+7-7 = 2-7
2x = -5
x = -5/2
  • Utilisateur Brainly
2014-06-14T14:20:28+02:00