Respuesta :

syang480

Answer: its just 12 because a is just a variable

Step-by-step explanation: so like 5 - 7n its just 5 - 7 which in 2 so 12a is just 12

Answer:

-79

Step-by-step explanation:

an=5-7n This is the given equation

Now, we substitute 12 for n and do the equation

a(12)=5-7(12)

a(12)=5-84

a(12)=-79 This is our answer, negative 79