Réponses

2013-11-28T22:15:54+01:00
Si x=5
G=3(20-2)
G=3*18
G=54
si 4x-2=7
G=3(7)=21
si12x=11
je distribue:(3*4x)+(3*(-2)
donc G=12x-6
G=11-6=5
je reflechis pour la suite


2013-11-28T22:17:06+01:00
Sauf erreur, voilà ...

1) x = 5 

G = 3 x 18 => G = 54

2) 4 x – 2 = 7 

G=3 x 7 => G = 21 

3) 12 x = 11 
G = 11 – 6 => G = 5

4)
6 x = 5 

G = 10 – 6 => G = 4

5)
2 x – 1 = 3 

G = 6 x 3 => G = 18

6)
3 x = 25

G = 100 – 6 => G = 94