Respuesta :

Answer:

f = 8

Step-by-step explanation:

9f = 8f + 8

9f - 8f

= f

So, f = 8

9(8) = 8(8) + 8

72 = 72

Answer:

f=8

Step-by-step explanation:

9(8)=8(8)+8

72=64+8

72=72