Question

how to balance equations

Answer 1

There are two kinds of equations to be balanced in chemistry. One is balanced by trial and error. That sounds like a big problem but it isn't. The other kind are oxidation-reduction equations (also called redox) and those are balanced by a set of rules. You just need to remember the rules. Having said that, the subject is vast. Here is a web site to balance the trial and error. After you have tried this you're welcome to post back and let us know specifically what problems you are having. I will post that link as a follow up to this post.

Answer 2

https://www.youtube.com/watch?v=HgB-t4Nq05c