Question

pv = nrt solve for r
r = pv - nt
r = p/n + v/t
r = (pv - n)/t
r = pv/nt

Explanation:

Step1: Isolate R in PV = nRT

Divide both sides by nT.
$R=\frac{PV}{nT}$

Answer:

$R=\frac{PV}{nT}$