Respuesta :

Answer:

x = 18

Step-by-step explanation:

The angles (x)° and (4x)° are complementary, meaning they form a 90° angle.

  • x + 4x = 90

Combine like terms :

  • x (1 + 4) = 90
  • 5x = 90

Divide both sides by 5 :

  • 5x/5 = 90/5
  • x = 18

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