Réponses

2013-12-09T19:31:41+01:00
1/ 11x+3 = 8x-7
11x-8x = -7-3
3x=-10
x = -10/3

2/ 8x=12x+4
8x-12x= 4
-4x=4
x=-1

3/5+6x=-x-9
7x=-14
x=-2

4/5x=3x+3
2x=3
x=3/2

Meilleure réponse !
2013-12-09T19:43:38+01:00
A) 11x+3=8x+7
11x-8x=7-3
3x=4
x=4/3
B)8x=12x+4
8x-12x=4
-4x=4
x=-1
C)5+6x=-x-9
6x+x=-9-5
7x=-14
x=-2
D)5x=3x+3
5x-3x=3
2x=3
x=3/2