# Balancing the Scale

## Opening

# Balance Scales

An *equation* consists of two equivalent expressions that are linked by an equal sign (=).

An *inequality* consists of two nonequivalent expressions that are linked by a less than sign (<) or a greater than sign (>).

Using the Balance Scale interactive, place the numbers 2 and 3 on the left side of the scale.

- What number(s) do you need to place on the right side of the scale in order to balance the scale?
- Write an equation to represent the balanced scale.
- Now, “unbalance” the scale so that what is on the left side is greater than what is on the right side.
- Write an inequality to represent the unbalanced scale.

INTERACTIVE: Balancing the Scale

## Hint:

- Think about the definitions of
*equation*and*inequality*:- An
*equation*consists of two equivalent expressions that are linked by an equal sign (=). - An
*inequality*consists of two nonequivalent expressions that are linked by a less than sign (<) or a greater than sign (>).

- An