Réponses

2013-05-26T20:34:53+02:00

Bonsoir

 

1) 11x -( x+1) = x-1

    11x -x-1= x-1

    11x-x-x = -1+1

    9x = 0

 x = 0

 

2) -6x+7 -x = x +2

-6x-x-x = 2-7

-8x = -5

x = 5/8

    

2013-05-26T20:37:08+02:00

1) 11x - (x + 1) = x - 1

11x - x - 1 = x - 1

10x - 1 = x -1

10x - x = -1 + 1

9x = 0

x = 0

 

2) -6x + 7 - x = x + 2

- 7x + 7 = x + 2

-7x - x = 2 - 7

-8x = -5

x = 5/8