#### Answer

x + y = 180

#### Work Step by Step

Since $\angle$1 and $\angle$2 are supplementary; m$\angle$1 + m$\angle$2 = 180.
Substitute in x for $\angle$1 and y in for $\angle$2.
x + y = 180.

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Published by
Brooks Cole

ISBN 10:
9781285195698

ISBN 13:
978-1-28519-569-8

x + y = 180

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