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Use angle relationships and the diagram at right to write and solve an equation for . Show all work.

Two decreasing parallel lines cut by a transversal, at the intersection of the left parallel & transversal, interior, upper angle labeled, 4, x minus 5 degrees, at the intersection of the right parallel & transversal, the interior lower angle labeled, 2, x plus 9 degrees.

How are these angles related? How can you use this relationship to find ?

They are alternate interior angles.