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ZA and ZB are supplementary angles. If mA = (2x − 9)º and m ZB = (2x +21)°, then find the measure of ZA.

ZA and ZB are supplementary angles. If mA = (2x − 9)º and m ZB = (2x +21)°, then find the measure of ZA.
asked 111k views
5 votes
ZA and ZB are supplementary angles. If mA = (2x − 9)º and m

ZB = (2x +21)°, then find the measure of ZA.

ZA and ZB are supplementary angles. If mA = (2x − 9)º and m ZB = (2x +21)°, then find-example-1
asked
User NawK
by
8.5k points

1 Answer

3 votes

angle A = 30

(2x-9) = (2x+21)
+9 +9
2x=2x+30

-2x -2x

=30

answered
User Kameka
by
8.3k points
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