Step-by-step explanation:
A balanced equation is the one which contains equal number of atoms on both reactant and product side.
For example,

Number of atoms on reactant side are as follows.
Number of atoms on product side are as follows.
Therefore, to balance the chemical equation multiply
by 3 and multiply
by 2 on reactant side. Whereas multiply
by 6 on product side.
Hence, the balanced chemical equation will be as follows.
