Answer:
30
Step-by-step explanation:
3(2a+4) if a=3
3( 6 +4)
3(10)
[ Answer ]
[tex]\boxed{30}[/tex]
[ Explanation ]
---------------------------------
A = 3
3 (2 · 3 + 4)
3 · 10
[tex]\boxed{[ \ Eclipsed \ ]}[/tex]