Respuesta :

Answer:

f = 4 pi

Step-by-step explanation:

f + 3 pi = 7 pi

f = 7 pi - 3 pi

f = 4 pi

Answer:

f = 4 pi

Step-by-step explanation:

f + 3 pi = 7 pi

Subtract 3 pi from each side

f + 3 pi -3pi = 7 pi -3 pi

f = 4 pi