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Help and don’t guess on it I need a real answer

Help and don’t guess on it I need a real answer-example-1

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Answer:

A, 76

Explanation:

According to the law of vertical angles, 3x+7 is equal to 4x-16.

Solving this equation for x gets x = 23.

Since the YAX angle measure is 3x+7, putting 23 in that expression is equal to 76.

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