Write and Solve Equations with Addition and Subtraction

• Addition

• Subtraction

• Multiplication

• Division

You have some trading cards. You give 21 cards to a friend and have 9 left for yourself. How many cards were in your original deck?

*Submit only the number as your answer*

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

x + 40 = 56

• x = 16

• x = 96

• x = 15

• x = 10

Solve the equation.

x + 9 = -5

Mathematical Equivalence

OFF

Solve the equation.

y - 8 = 9

• y = 17

• y = 2

• y = - 1

• y = 1

x - 3 = 5

• x = 8

• x = 2

• x = -2

• x = 3

y - 4.6 = 12

• 16.6

• 5.8

• 7.4

• Answer not Given

What is the inverse operation of subtraction?

• Subtraction

• Multiplication

• Division

• Addition