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Two parallel lines are crossed by a transversal.

Horizontal and parallel lines y and z are cut by transversal x. At the intersection of lines y and x, the top right angle is (2 k + 11) degrees. At the intersection of lines z and x, the bottom left angle is 131 degrees.
What is the value of k?

k = 9

k = 20
k = 60
k = 71


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