Question 469512
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Hi,
The measure of one angle is 30° more than twice the other
Let x and (2x +30°) represent the measures of these angles
Question states*** "Angles are supplementary
  x + (2x +30°) = 180°
Solving for x
    3x = 150°
      x = 50°,  It's supplementary angle is 130°     (2*50°+30
CHECKING our Answer***
  50° + 130° = 180°