A linear pair is a pair of angles that form a line. And since they form a line, when added, they equal 180.
x = one angle....y = the other one x + y = 180 x = y + 26 time to sub y + 26 + y = 180 2y + 26 = 180 2y = 180 - 26 2y = 154 y = 154/2 y = 77 <=== this is one angle
x = y + 26 x = 77 + 26 x = 103 <=== and the other one