Réponses

2014-10-18T18:13:29+02:00
3(2x + 5) - 5(7-3x)=0
6x+10 -35 +15x = 0
21x - 25 =0
21x = 25
x = 25/21
Merci bien Nanotata
Ah tu t'est trompé sur la 3 x 5 mais pg =)
2014-10-18T18:17:16+02:00
3 (2x + 5) - 5 (7-3x)=0
6x + 15 - 35 + 15x = 0
21x - 20 = 0
21x = 20
x = 20 / 21 = 0,95238095...