Respuesta :

Refer to the attachment

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Answer: 60°

Step-by-step explanation:

(x+40) is opposite to (3x) so they are equal

so x+40 = 3x

now we can solve the equation,

subtract one x from each side so now it is 40=2x

then divide by 2 on each side so now 20=x

no plug in the x to (3x) so 3(20)

3(20) = 60

so teh angle is 60°

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