Respuesta :
Answer:
3 + 12a
Step-by-step explanation:
3 + 3a + 9a
combine like terms and you have the answer
3 + 12a
Answer:
12a+3
Step-by-step explanation:
Step 1: Combine like factors so 3a and 9a
Step 2: Rewrite the expression 3+12a because 3a+9a= 12a