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we know
aoc+cod+dob=180
3x-5+55+x+20=180
4x+70=180
4x=110
x=27.5
aoc=82.5-5=77.5
dob=27.5+20=47.5
aoc+cod+dob=180
3x-5+55+x+20=180
4x+70=180
4x=110
x=27.5
aoc=82.5-5=77.5
dob=27.5+20=47.5
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