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OpenStudy (anonymous):
The excess of an angle over its supplement is 20 degrees. Find the angle.
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OpenStudy (anonymous):
100 degrees
OpenStudy (anonymous):
explain?
OpenStudy (anonymous):
x + y = 180 x - y = 20 Solve for x. You get 100
OpenStudy (anonymous):
but were using a formula that involves 180-n, the equation for a supplememtary angle
OpenStudy (anonymous):
Then 180 - n = x x - n = 20, x = 100
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