Respuesta :

Answer:

C.10

Step-by-step explanation:

Since the angels are vertical we know hey are congruent so set them equal to each other.First subract 3 from both sides. The equation now is 60=6x. Next divde both sidesz by 6. The equation now is x=10.

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Answer:

it's C. 10

Step-by-step explanation:

6(10)+3 = 63

6(13)+3 = 81

the answer need to equal the same amount as the top one which is 63 because that's a vertical angle