Response B is better because it more accurately references the equation visible in the image, follows the prompt instructions, and provides clear, correct, and complete information. Response A has a major factuality issue because it misreads the left side of the equation and therefore gets the wrong answer.

Response B provides superior accuracy by correctly interpreting the equation shown in the image and adhering to the given instructions while delivering information that is both clear and comprehensive. Response A contains a significant error in factual content due to misinterpreting the equation's left side, which leads to an incorrect conclusion.