Répondre :
Bonjour,
a) 2x - 4 = 6
2x - 4 + 4 = 6 + 4
2x = 10
2x/2 = 10/2
x = 5
b) 3x - x = x - 2 - x
2x = -2
2x/2 = -2/2
x = -1
c) 5x + 3 = 2x - 1
5x + 3 - 3 = 2x - 1 - 3
5x = 2x - 4
5x - 2x = 2x - 4 - 2x
3x = -4
3x/3 = -4/3
x = -4/3
Voilà, j'espère que ça t'aide ! :)
Bonjour;
2x-4=6
2x= 6+4
2x = 10
x = 10/2
x= 5
3x=x-2
3x-x =-2
2x= -2
x = -2/2
x= -1
5x+3=2x-1
5x-2x = -1 -3
3x = -4
x = -4/3