Réponses

2013-04-07T15:25:31+02:00

(3x + 2) + (7x + 4) = 0

3x + 2 + 7x + 4 = 0

10x + 6 - 6 = 0 - 6

10x / 10 = - 6 / 10

x = - 0,6