Respuesta :

nekosuzy

12x+20=104 (vertically opposite angles)

-20 on each side

12x=84

÷12 on each side

x=7

hope that helps^^

Answer:

x = 7.

Step-by-step explanation:

12x + 20 = 104    (Vertical angles are congruent).

12x = 84

x = 7.

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