bonjour

2 x = 7

x = 7/2

- 8 x = 15

x = - 15/8

x /7 = 6

x = 42

1.4 x = 16

x = 160/14 = 80/7

x /13 =  - 5

x = - 65

x /-4 = 3

x =   - 12

le reste est illisible