Répondre :
Bonsoir;
a) 4x+8=x-1
4x-x = -1-8
3x = -9
x = -9/3
x = -3
b) 5x+1=-2+3x -3
5x-3x = 2-3-1
2x = 2-4
2x = -2
x = -2/2
x= -1
c) 3x-1 =2(x+1)
3x-1= 2x+2
3x-2x = 2+1
x = 3
d) 4(x+1) -5=6x+5
4x+4 -5 = 6x+5
4x-1 = 6x+5
-1-5 = 6x-4x
-6 = 2x
x= -6/2
x = -3