Please help me answer this question. There’s a picture attached.

this is isosceles triangle, so side AB and BC are the same !
9x-8 = 28
9x=36
x=4
Answer:
probably 4 since the sides are the same
Step-by-step explanation:
9x-8=28
28+8=36
9x=36
36÷9=4
x=4