Correct Answer: Option D

Explanation

The diagram shows angles at a point, the total angle at a point is 360

  x - 10 + 4x - 50 + 2x + 3x + 20 = 360

  10x - 40 = 360

  10x = 360 + 40

  10x = 400

  x = \(\frac{400}{10}\)

  x = 40

There is an explanation video available below.

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