Answer:
x = 55degrees
Step-by-step explanation:
Find the diagram attached
Since triangle DBC is isosceles, the bse angles are equal. Let the base angles be y, hence;
y + y + <BDC = 180
2y + 50 = 180
2y - 180 - 50
2y = 130
y = 65
From triangle ADC;
x + < ADB + <BDC + <DCB = 180
x + 10 + 50 + 65 = 180
x+ 125 = 180
x = 180 - 125
x = 55degrees
