Réponses

2014-05-22T17:46:04+02:00
A. 5x=3x+3
5x-3x = 3
2x = 3
x = 3/2

d.7x+1=-4-x
7x+x = -4-1
8x = -5
x = -5/8

e.2+3x=7-3x
3x+3x = 7-2
6x = 5
x = 5/6
2014-05-22T17:55:23+02:00
Résous les équations suivantes :

a. 5x = 3x + 3
5x - 3x = 3
2x = 3
x = 3/2

d. 7x + 1 = - 4 - x
7x + x = - 4 - 1
8x = - 5
x = -5/8

e. 2 + 3x = 7 - 3x
3x + 3x = 7 - 2
6x = 5
x = 5/6