Question

An important formula from chemistry is PV=nrtPV=nrt. Solve the formula for t.

Answer 1

That doesn't seem entirely correct. It's the ideal gas law, but PV can't be the same as nrt and nrtPV times itself.
The correct one should be:
p * V = n * R * T

Then you can solve it for T.
(p * V)/(n*R) = T