Writing Equations

five times a number is twenty five.

• 3x = 25

• 4x = 25

• 5x = 25

• 6x = 24

Tags

CCSS.6.EE.B.7

The sum of x and ten is twenty.

• x - 10 = 20

• x + 10 = 20

• x/10 = 25

• 10x = 20

A number minus 9 is twelve.

• x - 9 = 12

• 9 - x = 12

• x - 9 = 13

• 9 - x = 14

Tags

CCSS.6.EE.B.7

Five less than a number n is thirty four.

• 5n = 36

• n + 5 = 35

• 5 - n = 34

• n - 5 = 34

Two less than a number is fourteen.

• x - 2 = 14

• 2 + x = 14

• x/2 = 15

• 2x = 13

Tags

CCSS.6.EE.B.7

A number times two is eight.

• 3x = 8

• 3 + x = 8

• 2x = 8

• 2 + x = 8

Tags

CCSS.HSA.CED.A.3

The sum of x and fifteen is fifty six

• x - 15 = 56

• 15x = 56

• x + 15 = 56

• 15x = 55

Tags

CCSS.6.EE.B.7

Mallory bought pizza and soda for a party. If she spent $12.57 on the sodas and $10.95 for each pizza, how many pizzas did she buy if her total is $89.22?

• 10.95x + 12.57 = 89.22

• 12.57x + 10.95 = 89.22

• 89.22x -10.95 = 12.57

• 12.57 + 10.95 = 89.22

Tags

CCSS.7.EE.B.4A

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

Tags

CCSS.HSA.CED.A.3

Elena is cutting a 30-foot piece of ribbon for a craft project. She cuts off 7 feet, and then cuts the remaining piece into 9 equal lengths of feet each. Which equation matches the situation?

• 7 + 9x = 30

• 30 = x - 7 - 9

• 30/x = 9-7

• x - 30 = 7(9)

Tags

CCSS.4.MD.A.2