Parallel Lines Are Cut By A Transversal Alternate Interior Angles Have Measures Of 3x + 17 And X + 53 Degrees?

Alternate interior angles add to 180°.
  (3x + 17) + (x + 53) = 180
  4x + 70 = 180
  4x = 110
  x = 27 1/2 One angle is
  3(27 1/2) + 17 = 99 1/2 degrees The other angle is
  (27 1/2) + 53 = 80 1/2 degrees