Respuesta :

sushhi

Answer:

13.

Step-by-step explanation:

3x+1  

x=4

Substitute x for 4

So, that would be 3*4+1

Now we multiply 3 and 4 to get 12. Then we add in the 1.

Answer:

5 x - 7

Step-by-step explanation:

3 × 4 + 1 = 13

So, 5 x - 7 (x = 4)

= 5 × 4 - 7

= 20 - 7

= 13