Question
If the angles (2x - 10)° and (x - 5)° are complementary angles, find x.

Answer

Since the angles are complementry.
Theefore their sum will be 90°.
⇒ (2x - 10)° + (x - 5)° = 90°
⇒ 2x - 10 + x - 5 = 90
⇒ 3x = 105°
⇒ x = 35°

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