Respuestas

2012-06-10T20:25:11+02:00

Hola.

 

x/5  +  2x  =  x +12

x/5  + 2x - x = 12

x/5 + x =12

 

(x + 5x)/ 5 =12

    6x = 60

     x =10

2012-06-10T20:26:23+02:00

x+2x=x+12

x + 2x - x = 12

5

x + x = 12

5

x + 5x = 12

   5

 

x + 5x= 12 . 5

x + 5x = 60 

6x = 60 

x = 10