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Meilleure réponse !
  • Utilisateur Brainly
2014-09-14T19:38:57+02:00
4(5 - 3x) - 5(3x + 2) = 8 - 6x
20 - 12x - 15x - 10 = 8 - 6x
20 - 10 - 8 = - 6x + 12x + 15x
2 = 21x
2/21 = x
2014-09-14T20:15:38+02:00
4(5 - 3x) - 5(3x + 2) = 8 - 6x
20 - 12x - 15x - 10 = 8 - 6x
20 - 10 - 8 = + 12x + 15x -6x
2 = 21x
2/21 = x