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Please help me quick! easy points

Please help me quick! easy points-example-1

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Answer: x=138 degrees

Explanation:

x+42=180 ==> Angle x and the supplementary angle of 42 are congruent angles, meaning that x and 42 add up to 180 degrees.

x-42+42=180-42

x=180-42

x=138 degrees

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