Temperature at which Fahrenheit and kelvin pair of scales give the same reading will be:
θ = -40
θ = 40
θ = 574.25
512.45
TF-32180= TK-273100
= θ-32180 = θ-273100 ⇒ 5 θ -32 ×5 = 9θ -273×9
= θ= 574.25