Bonjours a tous!! j ai besoin d'aide SVP!! J comprend pas :( L' exo Merci d'avance :)

a) 4x = -32
     x = -32/4 = -8

b) 7 + x = -7
   x = -7 -7 = -14

c) x/6 = 3
    x = 6×3 = 18

d) x + 2/3 = 0
   x = -2/3

e) (5/7)x = 1
    x = 1 x 7/5 = 7/5

f) (3/4)x + 2/5 = 0
  (3/4)x = -2/5
  x = -2/5 x 4/3 = -8/15

g) 5x-3 = 6-3x
    5x+3x = 6+3
    8x = 9
    x = 9/8

h) 7-4x = -3+2x
   7+3 = 4x+2x
   10 = 6x
    x = 10/6 = 5/3

i) 3(5-2x) = 7-4x
   15 - 6x = 7-4x
   15-7 = -4x+6x
   8 = 2x
   x = 8/2 = 4

j) 3-(2x-4) = x+7
   3-2x+4 = x+7
   7-2x = x+7
   7-7 = x+2x
   0 = 3x
   x = 0

k) 3(2x+7) - 4 = 7 - 5(4-3x)
   6x + 21 - 4 = 7 - 20 + 15x
   6x + 17 = -13 + 15x
   17+13 = 15x-6x
   30 = 7x
   x = 30/7

l) 2x(3x-4) + 5 = 3x(2x-5) - 4
   6x² - 8x + 5 = 6x² - 15x - 4
   6x² - 6x² - 8x + 15x = -4 - 5
  7x = -9
  x = -9/7