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2x + x + 35 + 3x - 5= 180
3x + 35 + 3x - 5= 180
3x + 3x + 35 - 5= 180
6x + 30= 180
6x= 180 - 30
6x= 150
x= 150 / 6
x= 25
Jadi, nilai x adalah 25.
6x+30 = 180
6x = 150
x = 25 cm