Equation review

What is the inverse operation of division?

• Division
• Multiplication
• Addition
• Subtraction

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 is the solution of 9 + k = 18

• 18

• 9

• 8

• 7

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 is the solution of 3w = 30

• 6

• 9

• 10

• 12

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.

Solve for x.

 $x-18=-18$  

• 0

• 18

• -18

• -36

Solve for r.

 $\frac{r}{3\ }=-12$  

• 36

• -36

• 4

• -4

m - 25.4 = 105

• 130.4
• 79.6
• 131
• 80