Réponses

2014-02-03T20:36:39+01:00
4/7x = 8
4=56x
4/56 = x

5/3x = 3
5=9x
5/9 = x

-3 + 5x = 12
5x = 12 + 3
5x = 15
x = 15/5
x = 3

4-3x = 8
-3x = 8 - 4
x = 4/-3


 les deux premières pas sur ...
Voila  !
si tu n'as pas compris demande !


2014-02-03T20:47:50+01:00
Bonsoir

4/7x=8
4x/7 = 56/7
4x = 56
x = 14

5/3x=3
5x/3 = 9
5x = 9
x = 9/5

-3+5x=12
5x = 12 +3
5x = 15
x = 3

4-3x=8

-3x = 8 -4
-3x = 4
x = -4/3