What angle is 24 degrees less than twice its own supplement?

Let n = the solution in degrees, then:

n = 2 x (180 - n) - 24

n = 360 - 2n - 24

3n = 360 - 24

n = 336/3

= 112o

Check: Supplement of 112o = 68o, 2 x 68 = 136, which is 24 more than 112.

Game over!