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5y=90
y=16
2. 6y+5y+3y=180
y=180/14=12,9
3. y+y=180-75
2y=105
y=52,5
2y + 3y + 90 = 180
5y = 180-90
5y = 90
y = 90/5
y = 18
2y = 2(18) = 36
3y = 3(18) = 54
Bagian B
4y + 5y + 3y = 180
12y = 180
y = 180/12
y = 15
4y = 4(15) = 60
5y = 5(15) = 75
3y = 3(15) = 45
Bagian C
y + y + 75 = 180
2y = 180-75
2y = 105
y = 105/2
y = 52,5
y = 52,5
y = 52,5