The line d is parallel to e, as shown in the figure above. Find the value of y.

Concept: In the figure, y is the exterior angle of the triangle shown, having two of its opposite interior angles as $90°$and  $58°$.
By exterior angle property, an exterior angle of a triangle is the sum of two of its opposite interior angles.
$\therefore \mathrm{y}=90°+58°=148°$
Hence, the value of $\mathrm{y}$ is $148°$