Question

The image shows parallel lines cut by a transversal. The expressions represent unknown angle measurements. What is the value of x?

a)5
b)7
c)9
d)11

Answer 1

Letter b
Angles are supplementary ( the sum of both angles =180)
11x + 8 + 12x +11 = 180
23 x = 180 - 19
23x -= 161
X = 7