Répondre :
Réponse:
a) 5x+2=3x+10
5x+2-2=3x+10-2
5x=3x+8
5x-3x=3x-3x+8
2x=8
b)3x+2=x-8
3x+2-2=x-8-2
3x=x-10
3x-x=x-x-10
2x=-10
c)8x+1=5x+4
8x+1-1=5x+4-1
8x=5x+3
8x-5x=5x-5x+3
3x=3
d)6x-1=x+4
6x-1+1=x+4+1
6x=x+5
6x-x=x-x+5
5x=5
Bonjour,
a) 5x+2-10 = 3x+10-10
5x -3x -8 = 0
2x -8 +8 = 0+8
2x = 8
x= 8/2 = 4
b) 3x+2+8 = X
3x+10 -10 -x = -10
2x = -10
x=-5
c) 8x +1 -5x = 5x-5x+4
3x+1= 4
3x+1-1=4-1
3x=3
X=1
d) 6x-1-x = x-x +4
5x-1 = 4
5x+1-1 = 4-1
5x = 3
x= 3/5 (=0,6)
a) 5x+2-10 = 3x+10-10
5x -3x -8 = 0
2x -8 +8 = 0+8
2x = 8
x= 8/2 = 4
b) 3x+2+8 = X
3x+10 -10 -x = -10
2x = -10
x=-5
c) 8x +1 -5x = 5x-5x+4
3x+1= 4
3x+1-1=4-1
3x=3
X=1
d) 6x-1-x = x-x +4
5x-1 = 4
5x+1-1 = 4-1
5x = 3
x= 3/5 (=0,6)