Which of the following is a pair of vertical angles?
B
A
B
х
ООО
с
D
A. ZAXD and ZAXC
B. ZBXC and DXE
C. ZAXB and ZDXE
D. ZAXE and ZBXC

B. <BXC and <DXE

Step-by-step explanation:

Vertical pair of angels are two opposite vertical angles formed when two traight lines intersect each other. They are of equal measure.

From the diagram, <BXC is vertically opposite to <DXE. Therefore they are a pair of vertical angles.

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: