The difference between 3 times an angle's supplement and 100 is 17. Find the measure of the angle?

The angle is 141 degrees.

Step-by-step explanation:

We start by listing the angle as x.

Noting that, we know that it's supplement is 180 - x.

With these two facts given, we can model the equation as the following and then solve for x.

3 (180 - x) - 100 = 17

540 - 3x - 100 = 17

440 - 3x = 17

-3x = - 423

x = 141