Réponses

2012-11-27T18:48:26+01:00

2(x+3) = 1

2x+6=1

2x=1-6

2x=-5

x=-5/2

 

3x-2=4/3

3x=4/3 +2

3x=10/3

x=10/3 /3

x=10

 

2/5 x+1=4/5

2/5 x= 4/5 -1

2/5 x= -1/5

x= -1/5 / 2/5

x= -1/50

 

3/7 x+4= -8

3/7 x= -8-4

3/7 x=-12

x= -12 / 3/7

x = -28

 

Voilà :)