Hi can you please guide me through the steps to solve this problem?

Answer:
[tex]x = 27 \frac{1}{3} [/tex]
Step-by-step explanation:
The little square on ∠AOC indicates that it is a right angle, which means that ∠AOC= 90°
∠AOC= ∠AOB +∠BOC
90°= (x+8)° +2x°
x +8 +2x= 90
3x +8= 90 (simplify)
3x= 90 -8 (-8 on both sides)
3x= 82
x= 82 ÷3
[tex]x = 27 \frac{1}{3} [/tex]