In the diagram PQ and MN are straight lines. Find the value of x
Attached Figure / Diagram
A
13o
B
17o
C
28o
D
30o
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
The straight line MN = 180 = 2(x+30o) + 86o =>
180 = 2x + 60o + 86o => 180o = 2x + 146o => 2x = 180 - 46 = 34o => x = 34/2 = 17o
Source: Myschool Past Questions Archive (Record #26686)