I think 63, but I'm not sure, how do I delete an answer-
Answer:
x=63
Step-by-step explanation:
∠BAC=∠ACD=x(AB∥CD)
∠BCA=∠BAC=x(base∠s, isos△)
∠？BC+∠BCA=90（ext.∠of△）
27+x=90
x=90-27
