Quiz #26

In an equation, you want to get the variable...

• on one side
• to disappear
• by itself
• to sing and dance

To solve one-step equations, you have to use the ________________ operation.

• Integer

• Inverse

• Additive

• Subtractive

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

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

m - 14 = 76

• m = 90

• m = 52

• m = -62

• m = 80

13x = 65

• x = 4

• x = 5

• x = -3

• x = 7

What is the inverse operation of subtraction?

• addition

• subtraction

• multiplication

• division

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.
• Add 7 to both sides.
  The solution is x = 19.
• Multiply both sides by 7 The solution is x = 84.

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

• x = 20
• x = 7
• x = 10
• x = 3