Respuesta :

(8 + 7a) + 4
=
(8 + 4) + 7a
= 12 + 7a
or
=7a + 12

Answer:

its 12+7a

Step-by-step explanation:

i used the answer that was below and it was backwards! please dont use it if you want it to be correct! the correct answer is 12+7a