Réponses

2014-05-04T14:37:51+02:00
Salut :)
40 -x = 33
-x = - 40 + 33
-x = -7
x = 7

x + 8 = 1
x = -8 + 1
x = -7

x - 102 = 101
x = 102 + 101
x =  103

2x = 1
x =  \frac{1}{2}
x = 0.5

9x = 72
x =  \frac{72}{9}
x = 8

8x = 24
x =   \frac{24}{8}
x = 3

 \frac{x}{3} = 6
x = 3 × 6
x = 18

 \frac{x}{100} = 6.4
x = 100 × 6.4
x = 640

 \frac{77}{x} = 7
x = 11

 \frac{543}{x} = 0.543
x = 1000





2014-05-04T14:50:44+02:00
1)-x=33-40
  6x=6è
  X=7
2)x+8=1
   x= -8+1
   x= -7
3)x-102=101
  x=102+101
  x=203
4)2x=1
   x=1:2
   x=0,5
5)9x=72
  x=72:9
  x=8
6)8x=24
9)77 sur x=7
x=77:7
x=11
10)
  x=24:8
  x=3
7)x sur 3=6
  x=3x6
  x=18
8)x sur 100=6.4
  x=100x6.4
  x=640
9)77 sur x=7
x=77:7
x=11
10)543 sur X=0,543
x=1000