Bonjour 1°) Résoudre les équations suivantes : a) 8x = -32 b) 7 + x = 24 C) 12x - 3 = 21 d) 2x - 7 = 4x + 13 e) 5(-3x + 4) = -6(2x - 1) Merci

Bonjour,

a) 8x = -32

x = -32/8 = -4

b) 7 + x = 24

x= 24- 7 = 17

C) 12x - 3 = 21

12x = 21+3

12x = 24

x=24/12 = 2

d) 2x - 7 = 4x + 13

-7 -13 = 4x -2x

-20 = 2x

-20/2 = x = -10

e) 5(-3x + 4) = -6(2x - 1)

-15x + 20 = -12x +6

20 -6 = -12x +15x

14 = 3x

x = 14/3