Réponses

2013-01-27T17:25:50+01:00

A. -2x + 5x = 3+4

3x = 7 donc x = 7/3

 

B. -2 + 4 = 5x + x

2 = 6x donc x = 2/6 = 1/3

 

C. t = (1/2)*5 = 5/2