# 2.04 Properties of equality and congruence

## Interactive practice questions

By which property are $9x=-27$9x=27 and $\frac{9x}{9}=\frac{-27}{9}$9x9=279 equivalent equations?

Multiplication property of equality.

A

B

Multiplication property of equality.

A

B
Easy
Less than a minute

Fill in the blank so that the resulting statement is true.

Fill in the blank so that the resulting statement is true.

Consider the true expression:

If $AB=CD$AB=CD then $CD=AB$CD=AB

Which of the following properties does this illustrate?