Respuestas

2012-10-02T03:48:19+02:00

4n-(4+n)=17

4n-4-n=17

4n-n=17+4

3n=21

n=21/3

n=7<<<<R//

2012-10-02T03:53:43+02:00

4n - 4 -n = 17

3n = 21

n=7

 

Rpta: N = 7