Hi,
Let x and (110°-x) represent the smaller and larger angle
Question states***
(180° - x)= 15[90°-(110-x)]
Solving for x
(180 - x)= 15[x - 20)]
180-x = 15x -300
480 = 16x
x = 30°, the smaller angle. 80° the meansure of the Larger angle
CHECKING our Answer***
150° = 15*10°