Explanation:
First set both equation equal to each other since the lines are parallel means that the corresponding angles are congruent. 2x+16=3x-12 x=28 then substitute for x in the equation and they both equal 72 so that is correct but then you need to subtract 180 from 72, so 180-72=108 so the answer is 108. :) If you're wondering why subtract from 180 is bc they are supplementary meaning both angles should add up to 180
Hope this helped