Respuesta :

Answer:

13x for A, 7f for B

Step-by-step explanation:

8x+5x=13x (Because 8+5=13)

9f+10f=19f

Subtract 12f and you get 7f

LittleAngel36

Answer for A is,

[tex]13x[/tex]

The answer for B is,

[tex]7f[/tex]

hope it helps.