Exercice1 Résoudre les équations suivantes : a)3x + 4 = 2X + 9/ b)2x + 3 = 3x - 5 c)3x + 1 = 7x + 5 d)5x + 8 = 0 e)5x - 1 = 2x + 4 f)5 - 4x = 0​

a) 3x-2x = 9-4
x = 5

b) 2x-3x = -5-3
-x = -8
x = 8

c) 3x-7x = 5-1
-4x = 4
-4x/4 = 4/4
-x = 1
x = -1

d) 5x = -8
x = -8/5

e) 5x-2x = 4+1
3x = 5
x = 5/3

f) -4x = -5
4x = 5
x = 5/4