Answer:
4a+4
Step-by-step explanation:
12a+8-8a-4
4(a+1)
Need to expand first
= 12a + 8 - 8a - 4
Group like terms
= 12a - 8a + 8 - 4
Solve
= 4a + 4
Can factorize
= 4(a + 1)
