You can put this solution on YOUR website! Supplementary angles add to 180 degrees.
I'm guessing there are 3 angles. other angles are x given is y
180= 2x+y
3x=y Substitute 3x for y
180=5x
x=36 Each other angle is 36 degrees so two others (if there's only 3) is 72 degrees.
180-72=y
y=108 Given angle is 108 degrees.