Write the balanced chemical equation for developing photographic films.

Explanation

To write the balanced chemical equation for the development of photographic films, we need to consider the key components involved in the process. Photographic films are typically coated with silver bromide (AgBr), and the development process involves the use of sodium thiosulfate (Na2S2O3), commonly known as hypo.

### Step-by-Step Solution:

1. **Identify the Reactants**: The main reactants in the development of photographic films are silver bromide (AgBr) and sodium thiosulfate (Na2S2O3).

2. **Write the Unbalanced Equation**: The initial unbalanced equation can be written as:
\[
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