Question 485306
For part one, it looks like part one needs some form of a diagram,
 I do not know what O is; is it a line?
Part two needs to have the angles 1,2,3 identified.
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So for part three.
1. 3x = 180 
x = 60 degrees, the supplement is 120 degrees.
2. 3x = 90 
x = 30, the complement is 60 degrees.
3. x + 12 = 2(180 - x) 
x + 12 = 360 - 2x
3x = 348
x = 116 degrees, the supplement is 64 degrees.
To check, 64 * 2 = 128, - 12 degrees is 116.
4. 180 - x = 6(90 - x)
 180 - x = 540 -6x
5x = 360
x = 72 degrees, the angle
complement = 18
supplement = 108
18 * 6  = 108 degrees.
5. A linear pair is 180 degrees.
3x = 180 degees,
x = 60 degrees.
2x = 120 degrees.
6. 3(90-x ) -30 = 180 - x
270 -3x -  30  = 180 - x
240 -3x = 180 - x
60 = 2x
30 degrees = x.
complement = 60
supplement = 150
3 * 60 = 180, 180 - 30 = 150 degrees for a check.
If you could clarify the first two parts we will look at them. They do not look too difficult with the proper information.
Cleomenius.