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Verified answer
3x+(2x-10)=1805x=180+10
5x=190
x=190/5
x=38
sudut BDC = 2x-10
= 76-10
= 66
5x - 10° = 180°
5x = 190°
x = 38°
L BDC = 2x - 10
= 2 x 38 - 10
= 66°