Réponses

2013-02-28T15:46:18+01:00

12-13=2x-8x/6

-1=2/3x

-3/2=x

 

je crois que cest ca 

Meilleure réponse !
2013-02-28T15:49:18+01:00
12-2x + 8x/6 = 13
12-2x+8x/6 -12 = 13-12
-2x+8x/6 = 1
-2x+8x/6 x6 = 1x6
-2x+8x = 6
6x = 6
6x/6 = 6/6
x = 1