Bonjour,
Indiquer si les équations ont les mêmes solutions:
x + 2 = 3
x + 2 - 2 = 3 - 2
x = 1
4x + 8 = 12
4x + 8 - 8 = 12- 8
4x = 4
x = 1
solutions identiques ✅
x - 3 = -5
x - 3 + 3 = -5 + 3
x = -2
-6x + 18 = 30
-6x + 18 - 18 = 30 - 18
-6x = 12
6x = -12
x = -2
solutions identiques ✅
x + 4 = 7
x + 4 - 4 = 7 - 4
x = 3
5x + 20 = 7
5x + 20 - 20 = 7 - 20
5x = -13
x = -13/5 = -2,6
Solutions différentes ❌
x + 5 = 11
x + 5 - 5 = 11
x = 11 - 5
x = 6
x/2 + 5/2 = 11/2
x + 5 = 11
x + 5 - 5 = 11
x = 11 - 5
x = 6
Solutions identiques ✅
Bonne journée.
