Let x represent the angle. Then its complement is 2x-6:
x +(2x -6) = 90
3x = 96
x = 32
180 -x = 148
The angle is 32°; its supplement is 148°.
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<em>Additional comment</em>
We are given a relation between the angle and its <em>complement</em>. We are asked for the value of the angle and its <em>supplement</em>. A typo in the problem is suspected.