URGENT Résoudre des Équations: Merci d'avance.

bonjour

d) 7 x +1 = - 4 - x
    7 x + x = - 4 - 1
    8 x = - 5
       x = - 5/8

e) 2 + 3 x = 7 - 3 x 
    3 x + 3 x = 7 - 2
    6 x = 5
        x = 5/6

f) 5 + 6 x = - x - 9
    6 x + x = - 9 - 5
    7 x = - 14
       x = - 14/7 = - 2

g) 11 x + 3 = 8 x + 7
     11 x - 8 x = 7 - 3
       3 x = 4
          x = 4/3

h) 5.5 x + 1.5 = 9 x + 6
     5.5 x - 9 x = 6 - 1.5
    - 3.5 x = 4.5
      x = - 4.5/3.5 = - 45/35 = - 9/7

i) 7 - 3.3 x = 2 x - 9.7
   - 3.3 x - 2 x = - 9.7  - 7
   - 5.3 x = - 16.7
   x = 16.7/5.3 = 167/53