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Answer:
Let a = measure of angle in degrees.
a = (1/2)(180 - a) - 15
a + 15 = (1/2)(180 - a)
2a + 30 = 180 - a
3a = 150
a = 50°
(1/2)(180 - 50) - 15 =
(1/2)(130) - 15 =
65 - 15 = 50°
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