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Let x, 4x and (5x-11)represent angles A,B and C respectively
Question states***
x + 4x + (5x-11°) = 180°
Solving for x
10x = 191°
x = 19.1°, measure of Angle A. B is 76.4° and C is 84.5°
CHECKING our Answer***
19.1° + 76.4° + 84.5° = 180°