Bonjour, Résoudre les équations suivantes : A) x+7 =0 B) 3x-5=4 C) 2x + 3 = 4x-3 D) -x+7 = -2x+1 Merci bien!

a)x=7

b)3x=4+5
3x=9
x=9/3

c)2x+3=4x-3
2x-4x=(-3)-4
6x=-1
x=-1/6

d)-x+7=-2x+1
-x+2x=+1-7
1x=-6
x=-6/1
remercie moi stp

a) x + 7 = 0
x = 0 - 7
x = - 7

b) 3x - 5 = 4
3x = 4 + 5
3x = 9
x = 9/3
x = 3

c) 2x + 3 = 4x - 3
2x - 4x = - 3 - 3 
- 2x = - 6 
x = - 6 / (- 2)
x = 3

d) - x + 7 = - 2x + 1
- x + 2x = 1 - 7
x = - 6