Answer:
f(a)=2a+4
Step-by-step explanation:
1. multiply 2×a, which equals to 2a
2. then multiply 2×3, which equals to 6
3. then you'll get f(a)=2a+6-2
4. subtract 6 and 2
5. once that is done your answer will be f(a)=2a+4
