We know that the angle across from 85° is 85° because of vertical angles. We also know that the 98° also has the same interior angle on the other parallel line because both lines are parallel. We subtract 96 from 180 to find the vertical angle for the right side of the triangle, which comes out to be 82°. Lastly, we solve x + 82 + 85 = 180 and we should get 13 as our answer.
