You can put this solution on YOUR website! Supplementary angles are angles that add up to 180 degrees. Therefore, if you add 85 degrees to the measure of its supplement, the sum will be 180 degrees.
x = measure of the supplement
x + 85 = 180
Subtract 85 from both sides: x = 95
***THE MEASURE OF THE SUPPLEMENT IS 95 DEGREES.***
Hope I helped! Good luck! =)