Respuesta :

unicornetfairies

Answer:

An obtuse angle.

Opposite angles are equal

4x-20=100

+20

4x =120

÷4

x=30

So, 30 x 4 =120. Then, minus 20 is 100.

HK0629
Answer: 30 degrees
100=4x-20 —>1st Add 20 on both sides
120=4x —>2nd Divide 4 on both sides
30=x
They are opposite angles therefore they are equivalent to each other!!

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