∠A and \angle B∠B are vertical angles. If m\angle A=(2x-4)^{\circ}∠A=(2x−4) ∘ and m\angle B=(x+1)^{\circ}∠B=(x+1) ∘ , then find the value of x.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: