Physical Chemistry Question: Can somebody show me how these are related?

Question

I need help relating these into one large equation:

V=3b P=(a/27b^2) T=(8a/27Rb)

Answer 1

T=(8a/27Rb)
P=(a/27b^2)
T/P = 8b/R
V=3b
T/(PV) = 8/ (3R)
or PV = 3RT/8
from the ideal gas equation PV = nRT, we get n = 3/8