If the  $m\angle7\ =\ 115\degree,$  find the measure of  $\angle2.$  

If the  $m\angle5\ =\ 63\degree,$  find the measure of  $\angle3.$  

Find the value of x if the  $m\angle1\ =\ 11x\ -\ 9\degree$ and the  $m\angle5\ =\ 7x\ +9\degree$ .

Find the value of x if the  $m\angle1\ =\ 13x+19\degree$ and the  $m\angle2\ =\ 22x-9\degree$ .

Find the value of x if the  $m\angle3\ =\ -4x+5\degree$ and the  $m\angle5\ =\ -13x+39\degree$ .