Réponses

2012-11-28T18:48:49+01:00

a) 2x+1=-4     2x=-4-1  x=-5/2

b) 7+5x=4   5x=4-7  x=-3/5

c) 4x-3=-7   x=-10/4

d) -5+3x=1  x=6/3

2012-11-28T18:48:55+01:00

a = 2x = -5

a = x = -5/2

 

b = 5x = -3

b = x = -3/5

 

c = 4x = -4

c = x = 1

 

d = 3x = 4

d = x = -4/3