An angle is 38° less than its supplement. What is the angle?

Explanation

1. 01

   Let the angle be $x$. Its supplement is $180^\circ - x$.

2. 02

   $x = (180^\circ - x) - 38^\circ$, so $2x = 142^\circ$ and $x = 71^\circ$.

3. 03

   Check: the supplement is 109°, and $109^\circ - 71^\circ = 38^\circ$.