Réponses

2013-03-27T14:58:21+01:00

1)  x=-7

donc les solutions de cette équation est -7 et 0

 2) x = 8+2

      x = 10

3) x = -3 donc les solutions est -3 et 0

4)5x= -2

    x= -2/5 donc la solution est -2/5

5) -8x = 5-6

     -8x = -1

       x= -1/8

6)

 

2013-03-27T15:00:12+01:00

x = -7

 

x = 2 + 8 = 10

 

3x = 0 <=> x = 0

 

4) 5x+2=0 <=> 5x = -2 <=> x = -2/5

5)-8x-5=-6 <=> - 8x = - 1 <=> x = 1/8

6)1/2x - 4/5 = 6/3 <=> 1/2x = 4/5 + 6/3 <=> 15/30x = 24/30 + 60/30 <=> 15x = 84 <=> x = 84/15

7)6/7x + 4/7= -2/7 <=> 6/7x = -6/7 - <=> 6x = -6 <=> x = -1

8)3x+2 = 2x-5 <=> 3x = -2x - 7 <=> 5x = -7 <=> x = -7/5

9)-5x+4 = 6x+8 <=> - 5x = - 4 + 6x + 8 <=> - 11x = 4 <=> x = - 4/11

10)5-9x=-3x+12 <=> - 6x = 7 <=> x = -7/6