Respuesta :
n+1=4(n+3)
n+1(4)(n)+(4)(3)
n+1=4n+12
n+1-4n=4n+12-4n
-3n+1=12
-3n+1-1=12-1
-3n=11
-3n/-3=11/-3
n=-11/3
n+1(4)(n)+(4)(3)
n+1=4n+12
n+1-4n=4n+12-4n
-3n+1=12
-3n+1-1=12-1
-3n=11
-3n/-3=11/-3
n=-11/3