Tolong dijawab secepatnya ya

sudut KLN + NLM = 180
3x + 15 + 2x + 10 = 180
5x + 25 = 180
5x = 180 - 25
x = 155 : 5
x = 31

sudut KLN = 3x + 15 = 3(31) + 15 = 108
pelurus sudut KLN = 180 - 108 = 72 derajat

maaf kalau salah