bonsoir
2 x - 1/3 = 3
2 x = 3 + 1/3
6 x /3 = 9/3 + 1/3
6 x = 10
x = 10/6 = 5/3
3 x - 9 = 3/5
15 x /5 - 45/5 = 3 /5
15 x = 3 + 45
15 x = 48
x = 48/15 = 3.2
2 x + 2 = 15 x - 6
2 x - 15 x = - 6 - 2
- 13 x = - 8
x = 8/13
6 - 4 + x = 2 - 5 x
x+ 5 x = 2 - 6 + 4
6 x = 0
x = 0
continues
soit x le nombre d'années
48 + x = 26 + x + 14 + x
x - x - x = 26 + 14 - 48
- x = - 8
x = 8
dans 8 ans