Réponses

  • Utilisateur Brainly
2014-05-18T15:15:13+02:00
  • Utilisateur Brainly
2014-05-18T15:16:38+02:00
 P = 2[(t+5)+(t-2)]

 P = 2(2t+3)

 P = 4t+6

 18 = 4t+6

 -4t = -18+6

  4t = 12

  t = 3