∠A and ∠B\angle B∠B are vertical angles. If m∠A=(5x+5)∘\angle A=(5x+5)^{\circ}∠A=(5x+5)∘ and m∠B=(6x−8)∘\angle B=(6x-8)^{\circ}∠B=(6x−8)∘, then find the value of x.