Respuestas

2012-10-20T17:22:56+02:00

2X - 1/2X = 54

3/2X = 54

X = 54 . 2/3

X = 36

 

comprobacion:

(2 . 36) - 1/2 . 36 = 54

 72 - 18 = 54

     54 = 54