What is the value of y?

Explanation is in the file

cutt.ly/tz3yDpb

y = 45

Step-by-step explanation:

Hey There!

The angle labeled x is supplementary to the angle that is equal to 135 meaning that the sum of the two angles will add up to equal 180

so to find x we subtract 135 from 180

180-135=45 so x = 45

Now we can find y

remember the sum of the triangles angles add up to equal 180

so we subtract the given angles(90 and 45) from 180

180-90-45=45

so y = 45

were is the equation