Answer:
x = 17
Explanation:
(6x - 20) and the angle vertically opposite (6x - 4) are same- side interior angles and sum to 180° , that is
6x - 20 + 6x - 4 = 180
12x - 24 = 180 ( add 24 to both sides )
12x = 204 ( divide both sides by 12 )
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