For this case we have that by definition:
Complementary angles are those that add up to 90 degrees.
We have the following variables:
x: Angle
y: Complement of the angle
According to the statement we have:

According to the given definition we have:

So, we have two equations with two unknowns:
-----> (1)
-----> (2)
From (1) we clear y:

We substitute and in (2):


Thus, the angle is
degrees.
Answer:
