Bonjour
Résoudre les équations suivantes :
1) x+7=2
x= 2 - 7
x = - 5
2) x-5=10
x = 10 + 5
x = 15
3) x-11=3
x= 3 + 11
x = 14
4) x+8=-1
x = - 1 - 8
x = - 9
5) x-4=-18
x = - 18 + 4
x = - 14
6) x+14=8
x= 8 - 14
x = - 6
7) x-27=-11
x = - 11 + 27
x = 16
8) x+42=103
x = 103 - 42
x = 61
9) -x+3=19
- x = 19 - 3
- x = 16
x = - 16
10) 17-x=-23
-x = - 23 - 17
- x = - 40
x = 40
11) -19-x=15
-x = 15 + 19
- x = 34
x = - 34
12) 25-x=13
- x = 13 - 25
- x = - 12
x = 12.