# Properties of Equality

## Opening

# Properties of Equality

**Read and Discuss**

Review the properties of equality.

*Addition property of equality*: If *a* = *b*, then *a* + *c* = *b* + *c*.

*Multiplication property of equality*: If *a* = *b*, then *ac* = *bc*.

So, for any equation that is true, you can do the following:

- Add the same value to both sides or subtract the same value from both sides, and the equation will still be true.
- Multiply or divide both sides by the same value, and the equation will still be true.