Respuestas

2012-05-30T01:54:19+02:00

x+14 = 3 x

 

se colocan las x a un lado 

14 = 3x- x

14= 2x

14/ 2 = x

7 = x

comprobamos

 

7+ 14= 3*7

21= 21

2012-05-30T01:56:13+02:00

x+14 = 3 x
14 = 3x- x
14= 2x
14/ 2 = x
7 = x