Respuestas

2012-10-15T22:28:45+02:00

(x - 5 x/12)-x/3=9

 

12x-5x-4x=9*12

3x=9*12

x=36

2012-10-15T22:28:52+02:00

5/12 + 4/12 +9= x

 

x-9=9/12

9=3/12

9=1/4

9*4=x

x=36