Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
So when 18 +1/4X u get X
so 18= 3/4 X
24=x
Answer: C I’m not 100% sure that is it because you have no explanation of your question.
It seems that this question is lacking information. Is there an image that should be attached with it?