Write an equation when Angle A and Angle B are vertical angles

∠A and \angle B∠B are vertical angles. If m\angle A=(4x+8)^{\circ}∠A=(4x+8) ∘ and m\angle B=(5x-3)^{\circ}∠B=(5x−3) ∘ , then find the measure of \angle A∠A.

Step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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