bjr
3x + 4 = 5x + 6
3x - 5x + 4 - 4 = 5x - 5x + 6 - 4
-2x = 2
-2x/(-2) = 2/(-2)
x = -1
3(2x-7)=10-5-4x (erreur énoncé ?)
3*2x + 3*(-7) = 10 - 5 - 4x
6x - 21 = 5 - 4x
6x + 4x = 5 + 21
10x = 26
x = 2,6
2x+2=5x-8
2x - 5x + 2 - 2 = 5x - 5x - 8 - 2
-3x = -10
x = 10/3
