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2x + 60 + 3x = 180
5x = 180 - 60
5x = 120
x = 24
Sudut M = 3x
= 3.24
= 72
2x+3x+60=180
5x+60=180
5x=180-60
5x=120
x=24
jadi sudut M adalah 3x=3.24=72
^-^