If p||q then, m∠1=m∠3
9x = 117
x = 117/9
x = 13
CAC can be changed into CAAC. This is because the first rule says that any letter can change into an A so
CAC=CAA
The last condition says that when you double , you have to double all letters,
Since A has been doubled,C needs to be doubled too.So:
CAA=CAAC
Can you provide me with a picture so that I can help you answer this question?