Réponses

  • Utilisateur Brainly
2014-04-21T19:38:41+02:00
A) 2x = 4
  x = 4

b) 3z = 21
   z = 7

c) -y = -1
   y = 1

d) 5x = -40
   x= -8

e) 3z = 7
    z = 7/3

Meilleure réponse !
2014-04-21T19:40:13+02:00
A)
2x-2=2
2x=2+2
2x=4
x= 4/2
x=2

b)
3z-10=11
3z=11+10
3z=21
z=21/3
z= 7

c)
1-y=0
-y=-1
y=1

d)
1+5x=-39
5x=-39-1
5x=-40
x=-40/5
x=-8

e)
2+3z=9
3z=9-2
3z=7
z=7/3