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AveGali [126]
3 years ago
15

I’m not sure if i’m right

Mathematics
1 answer:
Nataliya [291]3 years ago
3 0

Answer:

A. 20

Step-by-step explanation:

To solve this you must know that the angles marked are vertical angles and are congruent. So, you should set them equal to each other

x+40=3x

you would subtract x from both sides

40=2x

and then divide 2 from both sides

20=x

hope this helped!

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