Answer:
X=14
Explanation:
360-31-31=298
298/2=149
149-23=126
126/9=14
x = 14
arc JL = 180° ( JL is a diameter ), then
arc KL = 180° - 31° = 149° , so
9x + 23 = 149 ( subtract 23 from both sides )
9x = 126 ( divide both sides by 9 )
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