Réponses

  • Utilisateur Brainly
2014-03-21T18:51:43+01:00
C) 2x+ 4+3x/5 = 2 -x-6/10
10x+20+3x=10x-5x-3
-8x=-23
x=23/8

d) 7x-14/21 - 39/ 52= 5x/30
7x-2/3-3/4=x/6
84x-8-9=2x
82x=17
x=17/82

e) 3x-7/ 8 - 5x-1/16 = 3-2x/4 -1
48x-14-80x-1=48-8x-16
-24x=47
x=-47/24