2x+15°+3x+20°=180°
5x+35°=180°
5x=180°-35°
5x=145°
x=29°
3x+20
3(29°)+20°
87°+20°
107°
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2x+15°+3x+20°=180°
5x+35°=180°
5x=180°-35°
5x=145°
x=29°
3x+20
3(29°)+20°
87°+20°
107°