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∠A and ∠B are supplementary angles. If m∠A =(x−9)∘ and m∠B =(7x+21)∘, then find the measure of ∠B.

∠A and ∠B are supplementary angles. If m∠A =(x−9)∘ and m∠B =(7x+21)∘, then find the measure of ∠B.
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∠A and ∠B are supplementary angles. If m∠A =(x−9)∘ and m∠B =(7x+21)∘, then find the measure of ∠B.

User Matheus Martins
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8.1k points

1 Answer

1 vote

Answer: = 56

Explanation:

User Wright
by
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