Réponses

  • Utilisateur Brainly
2014-09-09T10:33:46+02:00
4x + 2/3x + 20 = 7x - 10
4x + 2/3x - 7x = - 10 - 20
- 3x + 2/3x = - 30
- 9/3x + 2/3x = - 30
- 7/3x = - 30
- 7x = - 30 x 3
- 7x = - 90
x = 90/7