bonjour
colonne gauche colonne droite
4 x + 8 = 12 4 x - 5 = - 3 x - 4
4 x = 12 - 8 4 x + 3 x = - 4 + 5
x = 1 7 x = 1
x = 1 /7
x + 1 = 5 x + 21 3 x + 1 = 9 + 5 x
x - 5 x = 21 - 1 3 x - 5 x = 9 - 1
- 4 x = 20 - 2 x = 8
x = - 5 x = - 4
8 x - 4 = x - 3 6 x - 9 = 10 x + 11
8 x - x = - 3 + 4 6 x - 10 x = 11 + 9
7 x = 1 - 4 x = 20
x = 1/7 x = - 5
x /2 - 1 = 2 x + 5 1 - 6 x = 3 x /2 + 7
x /2 - 2 /2 = 4 x /2 + 10 /2 2 /2 - 12 x /2 = 3 x /2 + 14 /2
x - 4 x = 10 + 2 - 12 x - 3 x = 14 - 2
- 3 x = 12 - 15 x = 12
x = - 4 x = - 12/15 = - 4 /5
4 x - 3 = x - 7 3 x + 5 = x + 7
4 x - x = - 7 + 3 3 x - x = 7 - 5
3 x = - 4 2 x = 2
x = - 4/3 x = 1
