Respuesta :

crystal2017fighter
-(2n + 4) + 6 = -9 + 4(2n + 1)
-2n - 4 + 6 = -9 + 8n + 4
-2n + 2 = -5 + 8n
2 = -5 + 10n
7 = 10n
n = 0.7