Réponses

2014-04-03T17:26:22+02:00
Salut :)

5/4x = 2 + 1/4x
5/4x - 1/4x = 2
3/4x = 2
3/4x = 8/4
x = 8/4 : 3/4
x = 8/4 x 4/3
x = 8/3
 
-1/2x + 5 = 3/2x + 9
5 = 3/2x + 9 + 1/2x
5 = 4/2x + 9
5 = 2x + 9
5 - 9 = 2x
-4 = 2x
x = -4/2
x = -2

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

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

J'espère t'avoir aidé(e) ! :)