Réponses

2013-09-29T19:55:59+02:00
(2/3)x+3=5/6+x
(2/3)x-x=5/6-3
(2/3)x-(3/3)x=5/6 -18/6
  (-1/3)x= -13/6
x=(-13/6) * (-3/1)
x=13/3
2013-09-29T19:59:18+02:00
(2/3)x + 3 = 5/6 + x
3-5/6=x-(2/3)x
18/6-5/6=3x/3-2x/3
13/6=x/3 on fait un produit en croix
3*13=6x
6x=39
x=39/6
x=6.5