Step-by-step explanation:
45°+90°+60°+X°=360° (being complete angle)
or,195°+X°=360°
or,X°=360°-195°
or,X°=165°
Therefore,valueof X is 165°.
Answer:

Step-by-step explanation:
<u>Step 1: Combine like terms</u>
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Answer: 
Use the zeroes to figure this out... x=-18, y=9