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Answers 1

Answer:

The value of x is 35°.

Step-by-step explanation:

3x + x + 40° = 180°       ( ∵ Angles on a straight line )

⇒ 4x + 40° = 180°

⇒ 4x = 180° - 40° = 140°

⇒ x = 140°/4 = 35°

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