3x-7+55+x+20=180°
4x+68=180..====> 4x=112==> x= 28°
So angle AOC=3x-7=84-7=77
Angle BOD=x+20=28+20=48°..
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So simply... 3x-7+55+x+20=180°
4x+68=180..====> 4x=112==> x= 28°
So angle AOC=3x-7=84-7=77
Angle BOD=x+20=28+20=48°..
Hope it helps....
3x-7+55+x+20=180°
4x+68=180..====> 4x=112==> x= 28°
So angle AOC=3x-7=84-7=77
Angle BOD=x+20=28+20=48°..