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Meilleure réponse !
2013-01-01T17:35:03+01:00

-6x=2/3

x = (2/3)/(-6)

x = (2/3) * (-1/6)

x = -2/18

x = -1/9

 

-3x+4=2(x+2/5) 

-3x+4=2x+4/5

-3x-2x=-4+4/5

-5x = (-20+4)/5

-5x = -16/5

 x  = (-16/5)/(-5)

x =(-16/5) * (-1/5)

x = 16/25

 

2(4-3x)=-x+5 

8 - 6x = -x + 5

-6x + x = 5 -8

-5x = -3

x = 3/5