100°
100

pls help i'll mark brainless

x=100º

Step-by-step explanation:

The two angles are vertical angles, so they are congruent.

100 because they are all the same until it comes to the point

Step-by-step explanation:

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: