The coefficients of the correctly balanced equation are the following: 1, 3, 2, and 3. Take note that balancing equations is something that people find complicated especially if they have not memorized the needed information yet. Those who do know how to balance chemical equations simply have to look at the given equation to know what to do next. Chemicals equations should be balanced as it signifies the fact that matter cannot be destroyed.
It can only change its form, its size, and so much more but it will still exist as matter albeit differently from what it used to be. Each element should have the same number of elements for the chemical equation to be balanced.