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5x+15 = 90
5x = 75
x = 15
sudut BOC
2x+5
2.15+5
30+5 = 35
5x + 15 = 90
5x =90-15
5x = 75
x = 75/5=15
BOC = 2x + 5
=2(15) +5
= 30 + 5=35