Geometry/Algebra Missing Angles

How would you find the missing angle with this setup: a 180 degree line with a right angle coming out, then another right angle forming two angles, one angle is x and the other is x - 16. 

x + x - 16 = 90  {the two angles add up to 90 degrees}
2x - 16 = 90  {combined like terms}
2x = 106  {added 16 to both sides}
x = 53  {divided both sides by 2}
x - 16 = 37
​
missing angles are 53 and 37

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