Respuesta :

TheBusinessMan

Answer:

n = 9

Step-by-step explanation:

3n-n+7=25

2n +7 = 25

2n = 18

n = 9

I hope this helps!

-TheBusinessMan

pragnaoli99

Step-by-step explanation:

3n-n=25-7

2n=18

n=18/2

n=9