Réponses

2014-09-13T13:47:49+02:00
2a - 8 - 7 + 2a - 4 = 0
4a - 19 = 0
4a = 19
a = 19/4
a = 4,75

  • Utilisateur Brainly
2014-09-13T13:50:09+02:00
2a - 8 - 7 + 2a - 4 = 0
2a + 2a = 8 + 7 + 4
4a = 19
a = 19/4

S= {19/4}