Two angles are said to be supplementary if their sum is 180 degrees. So, if x and y are supplementary angles, the formula is
[tex] x + y = 180 [/tex]
We know that one of the angles (say x) is 98. So, the equation updates to
[tex] 98 + y = 180 [/tex]
If we want to solve for the other angle, we can simply subtract 98 from both sides to get
[tex] y = 180-98 = 82 [/tex]
