nikoclapz nikoclapz 03-03-2021 Mathematics contestada ∠A and \angle B∠B are vertical angles. If m\angle A=(4x-13)^{\circ}∠A=(4x−13) ∘ and m\angle B=(3x+19)^{\circ}∠B=(3x+19) ∘ , then find the measure of \angle A∠A.