What's the answer to this question?

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asked Dec 14, 2018 115k views

1 Answer

Omni · Answer 1 · 2018-12-20T20:05:52+0000

They are vertical angles. Vertical angles are angles opposite each other when two lines intersect.
Thus
3x=80-x. __Add x to both sides
3x+x=80-x+x.___Combine like terms
4x=80.____Divide both sides by 4 to find x
4/4x=80/4
1x=20
x=20

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