Two parallel lines are intersected by a transversal. If one angle is 75 degrees, find the value of y.

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: Parallel lines and a transversal

The image shows two parallel lines intersected by a transversal. We need to find the value of $y$.
The angle given is $75^\circ$. Let's call the intersection points M (on line AB) and K (on line CD).
The angle $\angle EMB = 75^\circ$.
The angle we need to find is $y = \angle DKE$.

Step 1: Identify the relationship between the given angle and an angle related to $y$.
The angle $\angle EMB = 75^\circ$.
The angle vertically opposite to $\angle EMB$ is $\angle AMF$.
Therefore, $\angle AMF = 75^\