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### Course: Algebra (all content) > Unit 2

Lesson 2: Why we do the same thing to both sides of an equation# Dividing both sides of an equation

In this lesson, we learn how to find the mass of a mystery object using a balanced scale. By keeping the scale balanced and taking equal portions from both sides, we can determine the mass of the mystery object. This helps us understand the concept of equality in real-life situations. Created by Sal Khan.

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