Answer:
8
Step-by-step explanation:
You just gotta divide 64 by 8
120138 subtract both and that would be the answer
Answer: x=4
Steps: (I am assuming your question has a typo in it and by "c" you meant "x")
The rational expression equals zero

only when the numerator equals 0 (the denominator cannot ever be zero):

and that happens only for x=4