Answer :

mreijepatmat
Let x be the angle. Its supplement is 180 - x,

Now rewrite the English in math language:

x = 21 + 2(180 - x) →x = 21 + 360 - 2x

x + 2x = 381

x = 127°


duragpalsingh
Solution is enclosed.
${teks-lihat-gambar} duragpalsingh

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