Equations & Operations

What is the inverse operation of division?

• Division
• Multiplication
• Addition
• Subtraction

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11

• Multiply both sides by 11.

• Add 11 to both sides.

• Subtract 11 to both sides.

What is the inverse operation of subtraction?

• Subtraction
• Multiplication
• Division
• Addition

What is the correct step to solve for the variable?
15 = m - 5

• add 15 to both sides
• add 5 to both sides
• subtract 15 from both sides
• subtract 5 from both sides

What are inverse operations?

• Operations that are done using PEMDAS

• Operations that undo each other or reverse the effect of another operation

• Operations that always add more values to the operations

• what you do when you divide fractions

Summarize how you solve the equation below.

50 = 12 + x

• Subtract 12 from both sides of the equation. (take 12 from the 12 +x side and take 12 away from 50)

• Subtract 12 from the right side of the equation. (just take 12 away from the 12 + x side)

• Subtract 50 from both sides of the equation. (take 50 away from the 12 +x side and 50 away from 50)

• Combine 50 and 12

23=18+M

• M=41
• M=14
• M=12
• M=3

16 = W– 14

• W=20
• W=2
• W=17
• W=30

2y = 82

• y=52
• y=32
• y=41
• y=24

20=e/2

• e=25
• e=15
• e=40
• e=10