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attashe74 [19]
2 years ago
13

I don't know how to do math lol​

Mathematics
2 answers:
ch4aika [34]2 years ago
5 0

Answer:

It's 9 and if I'm wrong I just copied the other guys answer soo

Step-by-step explanation:

Nimfa-mama [501]2 years ago
3 0

9514 1404 393

Answer:

  (d)  9

Step-by-step explanation:

The relation you're supposed to apply here is ...

  an exterior angle of a triangle is equal to the sum of the remote interior angles.

__

The exterior angle is 17x+7, and it is equal to the sum of the two marked angles inside the triangle.

  17x +7 = 13x +3 +40

  4x = 36 . . . . . . . . . . . . . subtract 13x+7 from both sides

  x = 9 . . . . . . . . . divide both sides by 4

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