The sum of the angles in a triangle is 180.
x + 2x + 3x = 180
6x = 180
x = 30
That would make angle K, 2x = 2(30) = 60
That would also make angle L, 3x = 3(30) = 90
That would make angle KML x = 30
Since LMN + x= 180
LMN + x = 180
LMN = 150
That would make LMN 150 degrees.
I hope this helped. :))
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