Tolong bantuanya teman

180° = ( 3x+15 )°+ ( 2x+10 )°
180° = 3x + 2x + 15° + 10°
180° = 5x + 25°
180°-25° = 5x
155 = 5x
31 = x

↪Pelurus sudut KLN adalah sudut
NLM

Sudut NLM = 2 x + 10
= 2 (31) + 10
= 62 + 10
= 72 (B)