bantu yaa pleaseee pake cara

3x + 15 + 2x + 10 = 180
5x + 25 = 180
5x = 180-25
5x =155
x =155/5
x= 31

KLN = 3x + 15
= 3x31+15
=93 + 15 = 108

pelurus = 180 - 108 = 72 (besar MLN)
semoga membantu ya:))