Answer:
Let be the unknown angle, it's supplement is
It's complement is
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Answer:
Let
be the unknown angle, it's supplement is ![3x-60 3x-60](https://tex.z-dn.net/?f=3x-60)
It's complement is![90-60=30 90-60=30](https://tex.z-dn.net/?f=90-60%3D30)