Réponses

2013-09-15T16:32:23+02:00
6x + 3x + 15-x-3=4x-8
6x+3x-x-4x=-8-15+3
4x=-20
x=-20/4
x=-5
2013-09-15T16:42:31+02:00
6x+3(x+5)-(x+3) = 4(x-2)
6x+15x-3x = -8x
21x - 3x = -8x
18x = -8x