Réponse :
5x - 1 = 2x + 5
5x - 5x - 1 = 2x -5x + 5
-1 = - 3x + 5
-1 - 5 = 3x + 5 - 5
-6 = 3x
-6/3 = 3x/3
-2 = x
Bonjour
[tex]5x - 1 = 2x + 5[/tex]
[tex]5x - 2x = 5 + 1[/tex]
[tex]3x = 6[/tex]
[tex]x = 2[/tex]
