In a one-litre flask, 6 moles of A undergoes the reaction A(g) ⇌ P(g). The progress of product formation at two temperatures (in Kelvin), T₁ and T₂, is shown in the figure. If T₁ = 2T₂ and (ΔG₂° − ΔG₁°) = RT₂ ln x, then the value of x is ___. [ΔG₁° and ΔG₂° are standard Gibb’s free energy change for the reaction at temperatures T₁ and T₂, respectively.]