As for the chemical balancing method, we should have our own experience and not copy it. I hope it's very detailed, and it's best to give a few examples for everyone to understand better.

There are many ways to balance chemical equations: observation. Coefficient 1 method, that is, the coefficient of compounds containing more elements is tentatively set as 1 to balance. Commonly used in decomposition reactions, such as HNO3=NO2+O2+H2O. You can also solve the equation in an unknown way. Commonly used in chemical reactions with few kinds of elements. For example, FeS2+C+O2 = Fe3O4+Co+S.

There is also the charge conservation method of ion reaction equation, and there are more methods of redox reaction equation:

There are also 1, undetermined coefficient method, price fluctuation method, that is, the least common multiple method, such as the reaction of copper with dilute nitric acid.

The zero-valent method such as Fe3C+HNO3-Fe (NO3) 3+NO+CO2+H2O makes the valence of Fe and C in Fe3C zero.

According to the price fluctuation method, increase Fe: 3 * 3 = 9 C:1* 4 = 4 * * 4+9 = 13, and decrease N: 1*3=3, then the least common multiple is 39, so the Fe3C coefficient is 3 and HNO3 is/kloc. Just match it with something else. Just practice more. Wish you success!