Balance the following equation by oxidation number method:
`K_(2)Cr_(2)O_(7)+FeSO_(4)+H_(2)SO_(4)=Cr_(2)(SO_(4))_(3)+Fe_(2)(SO_(4))+K_(2)SO_(4)+H_(2)O`

Explanation

To balance the given redox reaction using the oxidation number method, we will follow these steps:

### Step 1: Write the unbalanced equation
The unbalanced equation is:
\[ K_2Cr_2O_7 + FeSO_4 + H_2SO_4 \rightarrow Cr_2(SO_4)_3 + Fe_2(SO_4)_3 + K_2SO_4 + H_2O \]

### Step 2: Assign oxidation numbers
- In \( K_2Cr_2O_7 \):
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