Respuesta :

20.


since we know one of the angles is 60 we can subtract that from 180

we get 120° left to figure out

we know that (x+20) + 3x has to equal 120

now we can solve this equation

(x+20) + 3x =120

4x+20=120

4x=100

100/4= 25

x=25
20^^^ lol I need points <3

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