Respuesta :
1/2n + 9 = 27
- 9 - 9
----------------------
1/2n = 18
------ --------
1/2 1/2n
n = 36
- 9 - 9
----------------------
1/2n = 18
------ --------
1/2 1/2n
n = 36
its 36 that is just a system called Begin Oppositive Divide or B.O.D you begin from the 27 then you do the oppositive of -/+ 9 then you divided by 1/2 and is equals to 36.
HOPE THIS HELPS!!!!
HOPE THIS HELPS!!!!