Which statement could be used in step 2 when proving x = 30? A 2-column table with

Which statement could be used in step 2 when proving x = 30? A 2-column table with 5 rows. Column 1 is labeled statements with the entries measure of angle O R P = 80 degrees semicolon measure of angle O R N = (3 x + 10) degrees, blank, blank, blank, blank. Column 2 is labeled reasons with the entries given, blank, blank, blank, blank.

AngleORP and AngleORN are a linear pair
AngleORP and AngleORN are vertical angles
80 = 3x +10
x = 30