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Math Multiple Choice

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In the figure, lines L,M, and N, and segment $\overline{PK}$ intersect at point P. What is the value of X?

A 90˚
B 80˚
C 30˚
D 45˚
E 120˚

The correct answer is .
The question type is .
The difficulty level is .
% of students answered this question correctly.

25˚ + 45˚ + 20˚ + x˚ =180˚ → x=90˚