Réponses

2014-05-21T18:03:48+02:00
30x+10x = 30(x+10)
40x = 30x+300
40x-30x = 30x-30x+300
10x = 300
x = 300/10
x = 30
  • Utilisateur Brainly
2014-05-21T18:10:45+02:00
Bonjour, 

30x + 10x = 30(x + 10)
40x = 30x + 300
40x - 30x = 300
10x = 300
x = 300/10
x = 30

Si tu as des questions, n'hésite pas! =)