bonjour
a. 8 x + 5 = 10
8 x = 10 - 5
8 x = 5
x = 5/8
b . 14 = 5 x - 9
- 5 x = - 9 - 14
- 5 x = - 23
x = 23/5
c. 6 x - 9 = 3 x - 15
6 x - 3 x = - 15 + 9
3 x = - 6
x = - 2
d. 14 = 5 x - 20
- 5 x = - 20 - 14
- 5 x = - 34
x = 34/5
e. 6 x - 12 = - 3 x + 3 + 2
6 x + 3x = 5 + 12
9 x = 17
x = 17/ 9