Respuestas

2012-09-16T23:28:46+02:00

 

 

 

 

2x-5 = x+2

2x -x -5 = x-x +2

x-5 = 2

x - 5 +5 = 2 +5

x = 2 + 5

x = 7

2012-09-16T23:35:21+02:00