Question 315331
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Let *[tex \Large x] represent the measure of the angle.  The sum of an angle and its supplement is *[tex \Large 180^\circ].   So the measure of the supplement has to be *[tex \Large 180\ -\ x]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ =\ 3(180\ -\ x)\ -\ 20]


Just solve for *[tex \Large x]


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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