Réponses

2012-12-10T21:15:05+01:00

a) 7x-4x =8-5 donc 3x= 3 x = 3/3 =1

 

b) 3x-x = 1+5 donc 2x = 6  x = 6/2 = 3

 

c) -11-5 = -5x-3x donc -16 = -8x donc x = -16/-8 = 2

 

d) 3x-3x = 1+5 donc 0x = 6  donc x = 0