Answer:
Step-by-step explanation:
m∠ABD= m∠CBD (as line BD bisects m∠ABC)
m∠ABD=(3x+6)°
m∠CBD=(7x-3)°
To find x;
3x+6=7x-18
18+6=7x-3x
24=4x
∴x=24/4=6
Thus m∠ABD=m∠CBD= (3x+6)°=3(6)+6=18+6=24°
m∠ABC=m∠ABD+m∠CBD=24°+24°=48°
