Two straight lines intersect. One of the angles formed is 86 degrees. Another angle is labeled y. Find the value of y.

The image shows two straight lines intersecting. The angle $y$ and the angle $86^\circ$ are vertically opposite angles.

Vertically opposite angles are equal. Therefore, the angle $y$ is equal to $86^\circ$.

The angle indicated by $y$ is $\boxed{\text{86}^\circ}$.