Equation balancing

I was balancing an equation and my equation got balanced but the coefficients of my balanced equation and answer key’s balanced equation are different.
This is the question

This is my answer

This is answer key’s answer

Which of the equation is more correctly balanced? And why?


The answer key is correct,
Although you found the right coefficients, we want these numbers to be the smallest whole numbers possible.
So you can divide each of the numbers by 2 to find the answer with the simplest ratio

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