Respuesta :

4x + 9 
4 x 3 +9 
Answer is (4 times 3 plus 9) = 21
4x + 9

First, make sure to change your x for (3). Simplify 4 × 3 to get 12. / Your problem should look like: 12 + 9
Second, simplify 12 + 9 to get 21. / Your problem should look like: 21

Answer: 21