Representing Equations

Write the equation represented by the model:

Mathematical Equivalence

ON

Label the expressions and key for this equation model.

a

b

c

4x

16

key

In this model what is the value of the ladybug?

• 2

• unknown

• 4

• 1

Write the equation represented by the model:

Mathematical Equivalence

ON

Solve the equation:
-5x = 25

• x = 20

• x = -20

• x = -5

• x = 5

Olivia bought a notebook for $12.50 and 9 pens. If her total was $43.73, how much was each pen?

• 12.5x +9 = 43.73

• 73.43 = 12.5x + 9

• 12.5 - 9x = 43.73

• 43.73 = 12.5 + 9x

After dropping 5ºF, the temperature was 37ºF. Which choice models this situation?

• d - 37 = 5

• d + 5 = 37

• d - 5 = 37

• d + 37 = 5

If one roll of masking tape costs $1.15, how many rolls can Emma buy with $5.75?

• 1.15(5.75) = x

• 5.75x = 1.15

• 1.15x = 5.75

• x = 1.15/ 5.75

The difference between 5 times a number and 3 is 12.

• 3h - 5 = 12

• 5h - 12 = 3

• 5h - 3 = 12

• 12h - 3 = 3

4x + 7 = 23

• x = 16

• x = 4

• x = 9

• x = 12