Answer:
Step-by-step explanation:
Exterior angle property:
Exterior angle of a triangle equals the sum of opposite interior angles
∠WBC = ∠D + ∠C
18x + 5 = 46 + 8x - 1
18x + 5 = 8x + 45
Subtract 5 from both sides
18x = 8x + 45 -5
18x = 8x + 40
Subtract 8x from both sides
18x - 8x = 40
10x = 40
Divide both sides by 10
x = 40/10
x = 4
