Réponses

  • Utilisateur Brainly
2014-10-24T17:20:54+02:00
2x/5 = 12/15
30x = 60
x = 60/30
x = 2

3/10 = x/x-3
3x - 9 = 10x
- 9 = 10x - 3x
- 9 = 7x
- 9/7 = x