In the diagram PQ and MN are straight lines. Find the value of x
A.
13o
B.
17o
C.
28o
D.
30o
Correct answer is B
The straight line MN = 180 = 2(x+30o) + 86o =>
180 = 2x + 60o + 86o => 180o = 2x + 146o => 2x = 180 - 46 = 34o => x = 34/2 = 17o