Step-by-step explanation:
there are 2 thing to remember here :
1. the sum of all angles in a triangle is always 180°.
2. the sum of supplementary angles is always 180°. this is e.g. given when there are multiple (at least 2) angles around a single point on one side of a line.
the third unnamed angle in the triangle is part of both situations : it is the third angle in the triangle, and it is the supplementary angle for "s + 32".
so,
angle + 2s = 180
angle + s + 32 = 180
therefore,
2s = s + 32
s = 32°
