Answer:
51 degrees
Explanation:
We can use the Vertically Opposite Angles to show that angle NTO = angle PTU. Then we can use Alternate Interior Angles to show that angle PTU = angle TUS.
So (55-x) = 63-3x
-8 = -2x
x = 4
TUS: 63-3x
63 - 3(4) = 51
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