Réponses

2014-10-13T20:59:36+02:00
3x+23=-7x+6
3x+23-23=-7x+6-23
3x=-7x-17
3x+7x= -7x-17+7x
10x=-17
10x/10=-17/10
x=-1.7 
  • Utilisateur Brainly
2014-10-13T22:57:32+02:00
3x + 23 = - 7x + 6
3x + 7x = 6 - 23
10x = - 17
x = - 17/10